Carditis
Inflammation of the heart.
This short breakdown does not identify the particular tissue or cause.
Fictional practice sentence
The interpreter requests clarification after hearing the term carditis.
Medical terminology study hub
Learn the parts, check the complete term, and practice it in a sentence. Use free flashcards and short quizzes, then return to the entries you need to review.
Start with a small set
1. Recognize the parts
Begin with eight roots and endings. Say a meaning before you reveal the card, then compare it with the reference.
Start eight flashcards2. Read a complete term
Choose an appointment topic. Check a whole definition and practice preserving a fictional sentence in your working language.
Explore heart terms →3. Return to the hard ones
Add an unfamiliar entry to your review set. Quiz misses join it too; use another round to check what you can recall.
Open my review set →Heart & bloodRoot
cardi/o
heart
Check the whole term before using a word-part meaning in an interpretation.
Keep this distinction
Find the heart-related part first, then check the rest of the word.
See the part in a complete term
- Carditis
- Inflammation of the heart.
- Pericarditis
- Inflammation of the sac around the heart, the pericardium.
- Cardiomyopathy
- Disease of the heart muscle.
A little help remembering
Only this selected word part is used to make a cue. Search text and quiz answers are not used.
Familiar marks are your own study notes. Quiz misses join your review set; a correct answer removes that entry. Without “remember,” both lists last for this page session.
36 complete medical terms in context
Read the definition, then use the fictional sentence for practice. Preserve uncertainty, corrections, and the specific structure or test the speaker names. Verify an equivalent for your language pair with a qualified reviewer.
Definitions are introductory paraphrases of the linked MedlinePlus sources. Source checked 2026-09-30. Sentences and study notes are our own.
Heart, blood and vessels8 complete terms with definitions, sources, and practice sentences
Pericarditis
Inflammation of the sac around the heart, the pericardium.
The full definition names the pericardium. A literal word-part reading alone is incomplete.
Fictional practice sentence
The provider points to the sac around the heart while explaining pericarditis.
Cardiomyopathy
Disease of the heart muscle.
Keep both roots. Omitting my/o loses the muscle-related detail.
Fictional practice sentence
The provider names cardiomyopathy and then explains the heart muscle.
Bradycardia
A slow heart rate.
This vocabulary explanation supplies no numerical threshold or clinical assessment.
Fictional practice sentence
The patient asks whether bradycardia describes the heart rate or blood pressure.
Hypertension
Blood pressure that stays too high over time.
Keep blood pressure distinct from heart rate. A vocabulary definition supplies no reading or assessment.
Fictional practice sentence
The patient asks whether hypertension is another name for high blood pressure.
Arrhythmia
A problem with the rate or rhythm of the heartbeat.
The term covers different rhythms. Preserve any more specific name the speaker gives.
Fictional practice sentence
The provider names an arrhythmia, then explains which rhythm they mean.
Tachycardia
A fast heart rate.
Tachy- and brady- point in different directions. The term alone gives no cause or treatment.
Fictional practice sentence
The patient asks the provider to explain tachycardia in everyday words.
Anemia
A condition in which blood cannot carry enough oxygen to the rest of the body.
Preserve confirmed versus suspected. The word alone does not identify the cause.
Fictional practice sentence
The patient asks whether the report confirms anemia or says further testing is needed.
Airways and breathing4 complete terms with definitions, sources, and practice sentences
Pharyngitis
Inflammation of the pharynx or throat.
Do not substitute larynx for pharynx because the words sound similar.
Fictional practice sentence
The provider says pharyngitis while discussing the patient's throat.
Pneumonitis
Inflammation of the lungs.
A similar-looking word such as pneumonia needs its own checked definition.
Fictional practice sentence
The patient asks the provider to repeat the word pneumonitis.
Dyspnea
Difficult or uncomfortable breathing, often described as shortness of breath.
Preserve the speaker's description and timing. This symptom term does not identify a cause.
Fictional practice sentence
The provider asks what the patient means when describing dyspnea.
Spirometry
A breathing test that measures how much air you can breathe out and how fast you can exhale.
The test describes measurements of breathing. Do not interpret the test name as a diagnosis.
Fictional practice sentence
The patient asks what the term spirometry means in the appointment letter.
Digestion and nutrition2 complete terms with definitions, sources, and practice sentences
Gastritis
Inflammation of the stomach.
Do not replace the specific structure with the whole digestive system.
Fictional practice sentence
The provider mentions gastritis while explaining the stomach findings.
Hepatitis
Inflammation of the liver.
The name alone does not establish the cause or a particular type.
Fictional practice sentence
The patient remembers hearing hepatitis but does not remember a type.
Bones, joints and movement2 complete terms with definitions, sources, and practice sentences
Arthritis
Inflammation or swelling affecting one or more joints.
A joint and a bone are different structures. Keep the named type and location.
Fictional practice sentence
The patient asks which joint the provider means when discussing arthritis.
Osteoporosis
A disease that weakens bones and makes them more likely to break.
Keep this term distinct from arthritis. Bone fragility and joint inflammation are different concepts.
Fictional practice sentence
The provider explains osteoporosis while discussing the patient's bone health.
Nerves, eyes and ears3 complete terms with definitions, sources, and practice sentences
Otitis
Inflammation of the ear.
Additional words can specify a location. Keep those details in the full term.
Fictional practice sentence
The patient asks which part of the ear the term otitis refers to.
Neuropathy
Disease of the nerves.
The suffix does not identify the cause, distribution or severity.
Fictional practice sentence
The patient asks what neuropathy means in the referral letter.
Otitis media
Inflammation of the middle ear.
Media adds a location to otitis. Keep it instead of reducing the phrase to an unspecified ear problem.
Fictional practice sentence
The provider says otitis media and explains that the middle ear is involved.
Skin, glands and cells3 complete terms with definitions, sources, and practice sentences
Dermatitis
Inflammation of the skin.
The ending does not identify a cause or establish infection.
Fictional practice sentence
The patient asks whether the note says dermatitis or an allergic reaction.
Hyperthyroidism
A condition in which the thyroid makes more thyroid hormone than the body needs.
Check the prefix. Hyperthyroidism and hypothyroidism describe different hormone-production problems.
Fictional practice sentence
The patient asks whether the referral says hyperthyroidism or hypothyroidism.
Hypothyroidism
A condition in which the thyroid does not make enough thyroid hormone.
Keep hypo- distinct from hyper-. Do not infer a laboratory value from the term.
Fictional practice sentence
The provider says hypothyroidism while reviewing the thyroid history.
Amounts, colors and change3 complete terms with definitions, sources, and practice sentences
Hyperglycemia
High blood glucose, also called high blood sugar.
Do not infer a measured value, cause or treatment from the word.
Fictional practice sentence
The provider says hyperglycemia; the interpreter asks to confirm the prefix.
Hypoglycemia
Low blood glucose, also called low blood sugar.
The prefix changes the meaning. Clarify if hyper- and hypo- were hard to distinguish.
Fictional practice sentence
The patient asks how hypoglycemia differs from hyperglycemia.
Diabetes mellitus
A disease in which blood glucose levels are too high.
Preserve the type if the speaker gives it. Hyperglycemia names high glucose, not a particular diabetes diagnosis.
Fictional practice sentence
The patient asks which type of diabetes mellitus the provider is discussing.
Tests and procedure endings11 complete terms with definitions, sources, and practice sentences
Gastrectomy
Surgical removal of stomach tissue.
The ending alone does not tell you the extent of removal. Check the full procedure description.
Fictional practice sentence
The scheduler reads gastrectomy from a referral and asks the patient to confirm it.
Nephrectomy
Surgical removal of kidney tissue.
The full name and description establish laterality and extent; do not infer them from the root.
Fictional practice sentence
The patient asks which kidney the planned nephrectomy concerns.
Complete blood count (CBC)
A blood test that measures blood cells and related features, including hemoglobin.
Expand the abbreviation only after confirming its meaning in this context. The test name is not a result.
Fictional practice sentence
The receptionist asks whether the order includes a complete blood count, or CBC.
Hemoglobin A1C (HbA1c)
A blood test that reflects average blood glucose over roughly the past two to three months.
Keep a longer-term average distinct from a glucose measurement at one moment.
Fictional practice sentence
The patient asks how an HbA1c test differs from today's glucose reading.
Electrocardiogram (ECG or EKG)
A test that records the heart's electrical activity.
An electrocardiogram records electrical activity. An echocardiogram uses ultrasound to make heart images.
Fictional practice sentence
The scheduler says ECG, then uses the name electrocardiogram.
Ultrasound
An imaging test that uses sound waves to make pictures of structures inside the body.
Sonogram refers to the image and is also used for the test. Keep an uncertain test name uncertain.
Fictional practice sentence
The patient thinks the appointment is for an ultrasound but asks staff to check the order.
Biopsy
Removal of a tissue sample for examination.
A biopsy names a sampling procedure. It does not itself establish a diagnosis or describe removal of a whole organ.
Fictional practice sentence
The provider says a biopsy would collect a sample, then pauses for questions.
Colonoscopy
An examination of the colon and rectum using a flexible tube with a camera.
Keep the specific part of the digestive tract. Do not substitute an upper-GI procedure.
Fictional practice sentence
The patient asks whether the appointment is for a colonoscopy or a different endoscopy.
Endoscopy
An examination inside the body using an instrument with a light and camera.
The full procedure name establishes the area. Endoscopy alone does not mean colonoscopy.
Fictional practice sentence
The provider names an endoscopy and then specifies the area they plan to examine.
Magnetic resonance imaging (MRI)
An imaging test that uses a magnetic field and radio waves to create detailed pictures inside the body.
MRI and CT use different imaging methods. Preserve the ordered test rather than choosing one from context.
Fictional practice sentence
The patient asks staff to confirm whether the order says MRI or CT.
Computed tomography (CT)
An imaging test that uses x-rays and a computer to make detailed cross-sectional pictures.
CT may also be called a CAT scan. This test name supplies no finding or result.
Fictional practice sentence
The scheduler reads computed tomography from the order, then says CT scan.
Medical terminology abbreviations
36 common abbreviations for recognition practice. These are listed meanings, not an approved charting list or a guarantee of what a speaker means. An abbreviation can have more than one meaning.
Source: MedlinePlus Appendix B ↗. Checked October 1, 2026. Our study notes and fictional exercises have not had independent clinical review.
Tests, imaging and lab terms
Recognize the test name, but keep results, numbers and units separate. A familiar abbreviation does not tell you whether a result is normal.
- ABG
- Arterial blood gases
- CBC
- Complete blood count
- CRP
- C-reactive protein
- CXR
- Chest x-ray
- ECG / EKG
- Electrocardiogram
- EEG
- Electroencephalogram
- GFR
- Glomerular filtration rate
- HCT
- Hematocrit
- HGB
- Hemoglobin
- HDL
- High-density lipoprotein
- LDL
- Low-density lipoprotein
- MRI
- Magnetic resonance imaging
- RBC
- Red blood cell
- WBC
- White blood cell
Conditions and infections
Keep the speaker’s level of certainty. “Checking for,” “history of” and “diagnosed with” are not interchangeable. Ask for the full term when the context is unclear.
- AFIB
- Atrial fibrillation
- CAD
- Coronary artery disease
- CHF
- Congestive heart failure
- COPD
- Chronic obstructive pulmonary disease
- DM
- Diabetes mellitus
- DVT
- Deep-vein thrombosis
- GERD
- Gastroesophageal reflux disease
- HTN
- Hypertension
- IBD
- Inflammatory bowel disease
- IBS
- Irritable bowel syndrome
- MI
- Myocardial infarction
- MRSA
- Methicillin-resistant Staphylococcus aureus
- URI
- Upper respiratory infection
- UTI
- Urinary tract infection
Care settings, measurements and routes
A route or allergy label alone is not a complete instruction. Preserve the information stated and ask the clinician to clarify anything missing or ambiguous.
- BP
- Blood pressure
- BMI
- Body mass index
- CPR
- Cardiopulmonary resuscitation
- ENT
- Ear, nose and throat
- ICU
- Intensive care unit
- IM
- Intramuscular
- IV
- Intravenous
- NKDA
- No known drug allergies
Medication shorthand: clarify, do not guess.
The Joint Commission does not publish an approved abbreviation list. Its prohibited list applies to orders and medication-related documentation. It includes U/u, IU, QD and QOD variants, MS, MSO4 and MgSO4, as well as unsafe decimal notation. Do not treat shorthand found on a chart as safe simply because you recognize it.
Ask the clinician to state the full medicine, unit or frequency. Follow the organization’s terminology and clarification procedures. This reference does not validate medication instructions, interpret lab results or choose translations for a language pair.
Practice the clarification, not just the expansion.
Fictional recognition exercises, not clinical scenarios or a scored competency test. Try answering before opening the note.
A note says “CA.” Can you choose a meaning from these two letters?
No. MedlinePlus lists both cancer and calcium for CA. Ask: “For the interpreter, could you say the full term you mean by CA?” Do not use the surrounding conversation to silently choose a diagnosis.
A speaker says, “We will repeat the CBC tomorrow.” What can you recognize, and what should you not add?
CBC is listed as complete blood count. Recognize the test name; do not add a result, reason or diagnosis that was not stated. If the term or language equivalent is uncertain, request clarification rather than filling the gap.
You encounter “MS” in a medication order. Is a memorized expansion enough?
No. MS appears on the Joint Commission’s prohibited list for orders and medication-related documentation. Ask the clinician to state the full medication name. Do not infer a medicine, dose or frequency from this study reference.
Medical terminology suffixes
A suffix can name a procedure, condition, or other feature at the end of a word. Read the root with it, then check the complete term. Compare -ectomy, -otomy, and -ostomy before memorizing another procedure name.
| Suffix | Meaning | Keep this distinction |
|---|---|---|
| -itis | inflammation | Inflammation and infection are not interchangeable words. |
| -megaly | enlargement | The root identifies what is enlarged; the suffix does not explain why. |
| -pathy | disease | A broad suffix cannot establish a particular cause. |
| -ectomy | removal | Compare removal with -otomy (incision) and -stomy (opening). |
| -otomy | incision or cutting | An incision is not the same as removing an organ. |
| -stomy | surgical opening | This suffix alone does not establish whether an opening is permanent. |
| -plasty | surgical reconstruction | Verify the name of the actual procedure, not just its ending. |
| -scopy | examination | The root and full procedure name supply the missing context. |
| -metry | measurement | Compare the act of measuring with -meter, the measuring device. |
| -centesis | puncture to remove fluid | Use the full term and source context when describing a procedure. |
| -uria | in the urine | The first part of the complete term supplies the missing substance or description. |
| -gram, -graph, -graphy | recording or written record | The exact ending helps distinguish a record, instrument or recording process. Verify the complete term. |
Source: MedlinePlus word parts. Practice the suffixes with flashcards →
Medical terminology flashcards
Choose word parts or complete terms, then select a topic. Cover the definition, say the meaning aloud, and reveal it to check your recall. Add uncertain entries to your review set even if the spelling looks familiar.
Use the “remember” checkbox if you want to keep that set on this device. Download the filtered list with its sources for your own notes.
Open flashcardsMedical terminology quizzes
Choose a five-, ten-, or twenty-question round. Complete-term questions include fictional sentences so you can check the meaning in context. Read the explanation after each answer.
At the end, retry just the entries you missed. A correct answer removes an entry from your review set; revisit the topic in a later session to check recall again.
Try a complete-term quizHow to use this
Recognition is a starting point.
- Choose one topic. Read the meaning and the note before moving on.
- Use flashcards to recall a meaning before revealing it. “Familiar” is your own study marker.
- Try a short quiz, revisit missed parts, and check a reliable reference for complete words.
A prefix usually comes at the beginning, a suffix at the end, and a root carries a central meaning. The slash in cardi/o marks a combining form; spellings can change in complete words.
Sources & boundaries
A study aid, not a diagnosis.
Word-part meanings are checked against MedlinePlus, National Library of Medicine. Source checked 2026-09-29. Study notes and questions are our own; this resource has not had independent clinical review.
This introductory collection is not a complete medical dictionary, certification course, or validated exam. It does not explain symptoms, recommend treatment, or verify a translation. A familiar word part is not a reason to guess an unfamiliar clinical term.
For a fuller introduction, use the MedlinePlus medical-words tutorial.
12 lessons, from word parts to careful interpretation
Start with the foundations or choose the topic you need. Each lesson includes a reading, a focused practice set and two self-checks with explanations. These are study exercises, not an accredited course.
1. Read a medical wordSeparate a word-part clue from a checked definition.
A prefix adds meaning at the beginning of a word. A root carries a central idea, often a body structure. A suffix adds meaning at the end. A word can have more than one root, and it does not need to contain all three kinds of component. Start by marking the parts you recognize, leaving unfamiliar pieces unresolved.
The slash in cardi/o separates the root from a combining vowel. You may see cardi- inside a complete word without the o. Learn the complete spelling alongside the study form rather than forcing each word to match a flashcard. The full term can also have an established meaning that a literal assembly of parts misses.
Use two columns in your notes: word-part clue and verified complete meaning. Keep those columns separate. A clue can guide a lookup; a reference and context settle the definition. An English definition still needs a checked equivalent before you use it in another language.
Parts to recognize
- cardi/o
- heart
- gastr/o
- stomach
- neur/o
- nerve
- hyper-
- above or excessive
- hypo-
- under or deficient
- -itis
- inflammation
- -megaly
- enlargement
- -pathy
- disease
Practice this lesson’s 8 word parts →
Try it without looking
Choose three parts from this lesson. Label each as a root, prefix or suffix, recall its meaning, and explain which part of a complete definition is still missing.
Does recognizing cardi/o establish a diagnosis?
No. Cardi/o supplies a heart-related clue. It does not identify a condition, cause, severity or treatment.
Can you replace -itis with the word infection?
No. The word-part meaning is inflammation. Infection is a different concept; the complete term and speaker's statement need to stay intact.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
2. Heart, blood and vesselsDistinguish the heart, vessels, blood and a clot.
Keep cardi/o, angi/o, hem/o and thromb/o in separate entries. They refer to the heart, a blood vessel, blood and a blood clot. A general label such as heart-related loses the difference between a structure, a substance and a finding. Phleb/o narrows the vessel clue to a vein.
Add brady- and tachy- as a contrast pair. One means slow and the other fast. They provide a rate clue, not a numerical threshold. Read the complete term before attaching a rate to a structure, and preserve any number and unit the speaker supplies.
Lymph/o and splen/o extend the study set beyond the most familiar heart words. Their placement in this set helps organize revision; it does not make lymph a kind of blood or the spleen a part of the heart. Grouping is a study choice, not a substitute for anatomy.
Parts to recognize
- cardi/o
- heart
- angi/o
- blood vessel
- hem/o
- blood
- phleb/o
- vein
- thromb/o
- blood clot
- lymph/o
- lymph
- splen/o
- spleen
- brady-
- slow
- tachy-
- fast
- -emia
- blood condition
Practice this lesson’s 10 word parts →
Try it without looking
Write heart, vessel, blood, vein and clot on separate cards. Match each to a root without looking, then reverse the direction. Finish with one slow-versus-fast contrast.
Which form narrows blood vessel to vein?
Phleb/o means vein. Angi/o gives the broader blood-vessel clue.
What information does tachy- leave unspecified?
Tachy- means fast. It does not supply a measured rate, a threshold, a cause or the structure involved.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
3. Airways and breathingKeep airway structures distinct from breathing itself.
Study rhin/o, pharyng/o, laryng/o, trache/o and bronch/o as distinct names: nose, pharynx, larynx, trachea and bronchus. Say the full English name before practicing an equivalent. Pharynx and larynx can look alike on the page, but they name different structures.
Thorac/o identifies the chest region. Phren/o refers to the diaphragm, while -pnea refers to breathing. That distinction separates an anatomical structure from a process. Do not use one broad word such as respiratory to replace each specific term.
Pneum/o can point to air or lung. This is a useful example of a root that cannot determine its own meaning without the rest of the word. Dys- adds difficulty or abnormality; a- or an- can indicate absence. A vocabulary exercise does not tell you how to assess someone's breathing.
Parts to recognize
- rhin/o
- nose
- pharyng/o
- pharynx (throat)
- laryng/o
- larynx (voice box)
- trache/o
- trachea (windpipe)
- bronch/o
- bronchus (large airway)
- pneum/o
- air or lung
- thorac/o
- chest
- phren/o
- diaphragm
- -pnea
- breathing
- dys-
- difficult or abnormal
- a-, an-
- without or lacking
Practice this lesson’s 11 word parts →
Try it without looking
Make two lists: structures and breathing-related components. Put each part in the appropriate list, then explain why -pnea belongs apart from trache/o.
Which pair is easy to confuse: pharyng/o and laryng/o?
Pharyng/o refers to the pharynx or throat; laryng/o refers to the larynx or voice box. Preserve the named structure.
Can pneum/o alone choose between air and lung?
No. You need the complete term and its reference context to choose the relevant meaning.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
4. Digestion and nutritionRecognize named digestive structures without broadening them.
Stomat/o refers to the mouth and gastr/o to the stomach. Their spellings invite confusion, so put them beside one another in your notes. Gloss/o and lingu/o refer to the tongue, while odont/o refers to a tooth. The surrounding sentence may use an everyday word where a written record uses a formal term.
Hepat/o names the liver; chol- points to bile. Duoden/o and ile/o identify different parts of the small intestine. Rect/o and sigmoid/o name other specific digestive structures. Preserve the level of detail in the source rather than rendering each one as intestine.
The ending -phagia concerns eating or swallowing. It is easy to confuse with -phasia, which concerns speech. Read the middle consonant and listen to the whole word. If you still cannot identify the term during a call, seek clarification rather than choosing the more familiar spelling.
Parts to recognize
- stomat/o
- mouth
- gloss/o, lingu/o
- tongue
- odont/o
- tooth
- gastr/o
- stomach
- hepat/o
- liver
- chol-
- bile
- duoden/o
- duodenum (first part of the small intestine)
- ile/o
- ileum (lower part of the small intestine)
- rect/o
- rectum
- sigmoid/o
- sigmoid colon
- -phagia
- eating or swallowing
Practice this lesson’s 11 word parts →
Try it without looking
Sort this set into structures, substances and functions. Circle the pair stomat/o and gastr/o, then write a one-line distinction you can recall without the table.
Does stomat/o mean stomach?
No. Stomat/o means mouth; gastr/o means stomach.
What changes between -phagia and -phasia?
-Phagia concerns eating or swallowing. -Phasia concerns speech. They should not share one glossary equivalent.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
5. Urinary and reproductive termsName the structure before studying its procedure endings.
Nephr/o points to the kidney and ur/o to urine. One is an organ and one a fluid. The ending -uria adds an in-the-urine clue; it needs the earlier components to supply the rest of the meaning. Cyst/o can refer to a bladder or a sac, so avoid giving it one fixed expansion in every complete word.
Keep hyster/o, oophor/o and orchid/o apart: uterus, ovary and testis. Prostat- refers to the prostate, and mamm/o or mast/o to the breast. Knowing which structure is named helps you notice when an interpretation has substituted a different organ.
A root does not establish laterality, how much tissue is involved or the scope of a procedure. Salping/o means tube; the complete term identifies which tube. During terminology preparation, verify the full procedure name and keep details such as one side or both attached to the speaker's wording.
Parts to recognize
- nephr/o
- kidney
- ur/o
- urine
- -uria
- in the urine
- cyst/o
- bladder or sac
- hyster/o
- uterus
- oophor/o, ovari/o
- ovary
- orchid/o, orchi/o
- testis
- prostat-
- prostate
- salping/o
- tube
- mamm/o, mast/o
- breast
Practice this lesson’s 10 word parts →
Try it without looking
Pair each structure with its everyday English name. Add a separate blank column for a checked language-pair equivalent; do not fill a gap by guessing from a related word.
Can cyst/o always be expanded as urinary bladder?
No. The form can mean bladder or sac. Check the complete word.
Does an ovary-related root say whether one or both ovaries are involved?
No. The root names a structure. Laterality and extent require the complete term or the speaker's stated details.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
6. Bones, joints and movementSeparate bone, joint, muscle and cartilage vocabulary.
Begin with oste/o, arthr/o, my/o and chondr-: bone, joint, muscle and cartilage. These structures are related, but each deserves its own checked entry. A general phrase such as a problem with the leg would lose detail if the source named a joint or a muscle.
Add cost- for rib, stern- for sternum and spondyl/o for vertebra. Dactyl/o refers to a finger or toe, while pod/o refers to a foot. A body-region topic can help you organize a glossary, but it does not let you infer which side the speaker means.
Kinesi/o gives a movement clue. Keep a function separate from an anatomical structure. Also distinguish my/o from myel/o, which can refer to spinal cord or bone marrow. Small spelling differences become easier to spot when you compare the forms before practicing longer terms.
Parts to recognize
- oste/o
- bone
- arthr/o
- joint
- my/o
- muscle
- chondr-
- cartilage
- cost-
- rib
- dactyl/o
- finger or toe
- pod/o
- foot
- spondyl/o
- vertebra
- stern-
- sternum (breastbone)
- kinesi/o
- movement
Practice this lesson’s 10 word parts →
Try it without looking
Sketch a simple study map with separate labels for bone, joint, muscle and cartilage. Add the matching roots, then test the reverse direction without looking at the drawing.
Are my/o and myel/o spelling variants of muscle?
No. My/o means muscle. Myel/o can mean spinal cord or bone marrow.
Does dactyl/o alone tell you finger rather than toe?
No. It supplies a digit-related clue. The full term or context identifies which digit.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
7. Nerves, eyes and earsDistinguish a region, a structure and a sensory function.
Cephal/o names the head, while neur/o points to a nerve. Mening/o refers to membranes around the brain and spinal cord. Replacing each with brain would erase distinct meanings. Myel/o also requires special care because its spinal-cord and bone-marrow meanings depend on the complete term.
Ophthalm/o names the eye. Blephar-, irid/o and retin- identify the eyelid, iris and retina. Ot/o names the ear, while myring/o and tympan/o refer to the eardrum. Acous/o points to hearing, a function rather than a whole organ.
The ending -phasia concerns speech. Keep it separate from -phagia for eating or swallowing. For a source-language term you cannot resolve, record the exact spelling as a research question. A plausible guess from the surrounding topic is still an unverified equivalent.
Parts to recognize
- neur/o
- nerve
- cephal/o
- head
- mening/o
- meninges (membranes around the brain and spinal cord)
- myel/o
- spinal cord or bone marrow
- ophthalm/o
- eye
- blephar-
- eyelid
- irid/o
- iris
- retin-
- retina
- ot/o
- ear
- myring/o, tympan/o
- eardrum
- acous/o
- hearing
- -phasia
- speech
Practice this lesson’s 12 word parts →
Try it without looking
Create one eye group and one ear group. Within each, distinguish the broader organ name from a specific structure or function. Explain each distinction aloud.
Which is more specific: ot/o or myring/o?
Myring/o refers to the eardrum. Ot/o refers to the ear.
Does cephal/o mean brain?
No. It means head. A region and an organ within that region are not interchangeable.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
8. Skin, glands and cellsKeep similar spellings and different biological scales apart.
Dermat/o refers to skin, aden/o to a gland and thyr/o to the thyroid gland. Onych/o refers to a fingernail or toenail. Preserve the specific structure when moving between a technical term and an everyday explanation; the everyday version should not erase information.
Hidr/o means sweat and hydr/o means water. Make this a spelling exercise as well as a recall exercise. If you only rehearse pronunciation, you may fail to notice a written distinction. Add one verified complete term beside each form when building your own glossary.
Cyt/o and -cyte concern cells, hist/o tissue and kary/o a nucleus. These words describe different scales. Gluc/o and glyc/o concern glucose or sugar. A substance-related root does not provide a laboratory result, its units or a normal range.
Parts to recognize
- dermat/o
- skin
- aden/o
- gland
- thyr/o
- thyroid gland
- hidr/o
- sweat
- hydr/o
- water
- onych/o
- fingernail or toenail
- cyt/o
- cell
- -cyte
- cell
- hist/o
- tissue
- kary/o
- nucleus
- gluc/o, glyc/o
- glucose or sugar
Practice this lesson’s 11 word parts →
Try it without looking
Write hidr/o and hydr/o from memory, label each, and compare with the reference. Then put nucleus, cell and tissue on separate cards before matching their forms.
Which form means sweat: hydr/o or hidr/o?
Hidr/o means sweat. Hydr/o means water.
Is hist/o a synonym for one cell?
No. Hist/o means tissue. Cyt/o and -cyte supply cell-related meanings.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
9. Location, direction and timePreserve where and when a term places something.
Intra- means within; inter- means between. Peri- means around. These prefixes need a reference structure supplied by the rest of the word. Read the full term before choosing the relationship, and do not omit the prefix when it carries a meaningful location difference.
Endo- and ecto- contrast inner with outer. Sub- and supra- contrast under with above. Trans- can mean across or through. Practice these as relationships rather than treating them as names for body parts.
Pre- means before, while post- can mean after or behind. Ante- can mean before or forward; anti- means against. Some forms cross time and location meanings. The surrounding term settles the intended use, so keep your example and source beside the definition.
Parts to recognize
- peri-
- around
- intra-
- within
- inter-
- between
- endo-
- within or inner
- ecto-, exo-
- outside or outer
- epi-
- upon or outside of
- sub-
- under
- supra-, super-
- above
- pre-
- before
- post-
- after or behind
- ante-
- before or forward
- anti-, contra-
- against
- trans-
- across or through
Practice this lesson’s 13 word parts →
Try it without looking
Choose a neutral object, such as a box, and use it to recall within, between, around, above and below. Then return to real medical vocabulary and verify each complete word in a reference.
Which means between: intra- or inter-?
Inter- means between. Intra- means within.
Are ante- and anti- interchangeable?
No. Ante- means before or forward; anti- means against. Keep their full spellings visible during review.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
10. Amounts, colors and changeRecognize quantity clues without inventing measurements.
Hyper- and hypo- form one contrast; poly- and oligo- form another. Above or excessive differs from under or deficient, and many differs from few. None of these prefixes supplies an exact measurement. Preserve numerical results and units as their own details.
Micro- and macro- concern size. Bi-, tri- and hemi- concern two, three and half. Learn the literal clues before testing them inside complete terms. A prefix with a familiar everyday use can carry a more specific meaning in an established medical word.
Cyan/o, erythr/o and leuk/o provide blue, red and white clues. Color vocabulary does not authorize a diagnosis from appearance. Dys- and pseudo- need equal care: abnormal or false inside a technical word does not justify a judgment about a person's behavior or credibility.
Parts to recognize
- hyper-
- above or excessive
- hypo-
- under or deficient
- poly-
- many or excessive
- oligo-
- few or little
- micro-
- small
- macro-
- large
- bi-
- two
- tri-
- three
- hemi-, semi-
- half
- cyan/o
- blue
- erythr/o
- red
- leuk/o
- white
- dys-
- difficult or abnormal
- pseudo-
- false
Practice this lesson’s 14 word parts →
Try it without looking
Create paired prompts for excessive/deficient, many/few and small/large. Add one sentence explaining what each prefix does not tell you, such as a count, unit or cause.
Does poly- tell you an exact number?
No. It means many or excessive. A numerical count needs a separate source.
Does pseudo- in a technical word establish that a speaker is lying?
No. It is a word-part clue. Preserve the established meaning of the term without adding a judgment.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
11. Tests and procedure endingsDistinguish the action named by a procedure ending.
Study -ectomy, -otomy and -stomy together. Removal, incision and a surgical opening describe different actions. Recognizing the same root in three words does not make the procedures equivalent. Read the ending before trying to explain the whole term.
Add -plasty for surgical reconstruction, -pexy for fixation, -desis for binding and -rrhaphy for suturing. These short meanings are starting points. They do not state how a procedure will be performed, its risks, or what the patient should do afterward.
-Scopy concerns examination. -Metry concerns measurement and -meter a measuring device. -Centesis supplies a puncture-to-remove-fluid clue, while -tripsy supplies crushing. A full procedure explanation needs a source for that procedure rather than a list of component meanings.
Parts to recognize
- -ectomy
- removal
- -otomy
- incision or cutting
- -stomy
- surgical opening
- -plasty
- surgical reconstruction
- -scopy
- examination
- -metry
- measurement
- -meter
- measuring device
- -centesis
- puncture to remove fluid
- -desis
- surgical binding
- -pexy
- surgical fixation
- -rrhaphy
- suture
- -tripsy
- crushing
Practice this lesson’s 12 word parts →
Try it without looking
Sort the endings into examination or measurement, removal or cutting, and other surgical actions. For each, write one nearby ending you must not substitute.
Can you render -otomy as removal?
No. -Otomy means incision or cutting. -Ectomy supplies the removal clue.
What is the distinction between -meter and -metry?
-Meter identifies a measuring device; -metry identifies measurement. Verify the full test or device name.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
12. Condition endings and limitsRecognize broad endings without over-interpreting them.
-Itis, -pathy and -osis provide different levels of information: inflammation, disease, and a broad condition ending. A suffix cannot tell you the cause of a condition or establish the diagnosis of a person. Keep the distinction between vocabulary recognition and clinical interpretation visible in your notes.
Contrast -megaly with -penia, and -malacia with -sclerosis. Enlargement differs from deficiency; softening differs from hardening. The root identifies the structure or substance. The whole term may carry a definition more specific than the literal sum of its parts.
-Oma is a tumor-related clue, not a rule that a term means cancer. -Oid means resembling. -Rrhea and -rrhage distinguish flow or discharge from bleeding. These are useful review pairs because substituting one familiar ending can change the statement you render.
Parts to recognize
- -itis
- inflammation
- -pathy
- disease
- -osis
- condition, often abnormal
- -oma
- tumor
- -penia
- deficiency or lack
- -megaly
- enlargement
- -malacia
- softening
- -sclerosis
- hardening
- -phagia
- eating or swallowing
- -phasia
- speech
- -rrhea
- flow or discharge
- -rrhage
- bleeding
- -oid
- resembling
Practice this lesson’s 13 word parts →
Try it without looking
Choose two endings you confuse. Write their meanings, the exact spelling difference and a question you would need a complete-term reference to answer. Revisit the pair after another topic.
Does -oma alone establish a malignant tumor?
No. A tumor-related word-part clue does not establish cancer or benign versus malignant status. Check the full term.
Are -rrhea and -rrhage equivalent?
No. -Rrhea means flow or discharge; -rrhage means bleeding. Keep the specific ending and full meaning.
Word-part reference: MedlinePlus, National Library of Medicine. Explanations and exercises are our own.
15 worked medical-word breakdowns
Cover the explanation, identify the parts you know, then check the whole meaning. The notation below highlights components; it is not a pronunciation guide or a complete clinical definition.
Source: MedlinePlus, National Library of Medicine: Understanding Medical Words. For pericarditis, also see pericardial disorders.
Dermatitisdermat- (skin) + -itis (inflammation)
Inflammation of the skin.
The ending does not identify a cause or establish infection.
Gastritisgastr- (stomach) + -itis (inflammation)
Inflammation of the stomach.
Do not replace the specific structure with the whole digestive system.
Hepatitishepat- (liver) + -itis (inflammation)
Inflammation of the liver.
The name alone does not establish the cause or a particular type.
Otitisot- (ear) + -itis (inflammation)
Inflammation of the ear.
Additional words can specify a location. Keep those details in the full term.
Pharyngitispharyng- (pharynx) + -itis (inflammation)
Inflammation of the pharynx or throat.
Do not substitute larynx for pharynx because the words sound similar.
Pneumonitispneumon- (lung) + -itis (inflammation)
Inflammation of the lungs.
A similar-looking word such as pneumonia needs its own checked definition.
Carditiscard- (heart) + -itis (inflammation)
Inflammation of the heart.
This short breakdown does not identify the particular tissue or cause.
Pericarditisperi- (around) + card- (heart) + -itis (inflammation)
Inflammation of the sac around the heart, the pericardium.
The full definition names the pericardium. A literal word-part reading alone is incomplete.
Neuropathyneur/o (nerve) + -pathy (disease)
Disease of the nerves.
The suffix does not identify the cause, distribution or severity.
Cardiomyopathycardi/o (heart) + my/o (muscle) + -pathy (disease)
Disease of the heart muscle.
Keep both roots. Omitting my/o loses the muscle-related detail.
Bradycardiabrady- (slow) + cardi- (heart), in the complete term bradycardia
A slow heart rate.
This vocabulary explanation supplies no numerical threshold or clinical assessment.
Hyperglycemiahyper- (excessive) + glyc- (glucose) + -emia (blood condition)
High blood glucose, also called high blood sugar.
Do not infer a measured value, cause or treatment from the word.
Hypoglycemiahypo- (deficient) + glyc- (glucose) + -emia (blood condition)
Low blood glucose, also called low blood sugar.
The prefix changes the meaning. Clarify if hyper- and hypo- were hard to distinguish.
Gastrectomygastr- (stomach) + -ectomy (removal)
Surgical removal of stomach tissue.
The ending alone does not tell you the extent of removal. Check the full procedure description.
Nephrectomynephr- (kidney) + -ectomy (removal)
Surgical removal of kidney tissue.
The full name and description establish laterality and extent; do not infer them from the root.
A four-week route through the library
This is a suggested study schedule, not a claim about how fast you should learn. Repeat a week if the distinctions are still uncertain. Short quizzes sample recall; they do not certify readiness for patient calls.
Week 1: Build the method
Read lessons 1–3. Choose six to ten parts per session. Recall each meaning before opening a flashcard, then write one contrast you need to remember. Finish with the heart and airway worked examples.
At the end of the week, revisit a set without your notes. Record which distinctions you still confuse, rather than treating a familiar-looking card as mastered.
Week 2: Name the structure
Read lessons 4–6. Separate organs, substances and functions. Create checked glossary entries for complete terms from your own public study sources. Keep an unresolved label beside any target-language equivalent you have not verified.
Revisit a week-one set between new sessions. Compare yesterday’s missed parts before adding another topic.
Week 3: Hear the small differences
Read lessons 7–10. Focus on pairs such as my/o and myel/o, intra- and inter-, and hyper- and hypo-. Ask a partner to read a verified term, then check both its spelling and meaning.
Do not add a pronunciation from memory as a trusted answer key. Use a reliable pronunciation reference or a qualified reviewer.
Week 4: Put the terms in messages
Read lessons 11–12. Compare procedure endings, then complete a mixed quiz. Move to the fictional dialogues in our medical interpreter practice guide.
Review the whole message: negation, uncertainty, corrections and speaker intent. Ask a qualified language partner to assess your equivalent and register. Keep unresolved terminology on your next study list.
Questions about studying medical terminology
Should I memorize complete words or word parts?
Use both. Parts help you organize vocabulary and recognize possible meanings. Check complete words in context so you do not treat a literal breakdown as the full definition. For interpreting, verify the equivalent in your working language too.
Do I need to study the whole library at once?
No. Start with one lesson and a set you can recall without looking. Use the lesson selector in the practice tool to limit flashcards and quiz questions to that set. Expand the set after reviewing what you missed.
Are these quizzes certification practice tests?
No. They check word-part recall with deterministic answers. They do not test bilingual interpreting, clinical knowledge or a certifier’s current exam requirements, and they do not award credit or a certificate.
Can this tool check my medical interpretation?
No. The optional study cue helps you recall a selected word part. It does not accept patient details or free-text translations and does not grade your interpreting. Check each cue against the displayed meaning and source.
Can I use the material without an account?
Yes. The lessons and reference are available without an account or JavaScript. Search, flashcards and quizzes need JavaScript. Familiar marks persist only if you choose to remember them on this device.
How do I keep a useful bilingual glossary?
Save the complete source term, meaning, topic, verified target-language equivalent, source links and review status. Use fictional practice sentences. Keep patient identifiers and actual call transcripts out of a study glossary. Our terminology study guide includes a template and review routine.
Your word-parts reference
Introductory meanings. Source: MedlinePlus Appendix A. Checked 2026-09-29
Browse all 185 word parts and meanings
- cardi/o Root
- heart
- angi/o Root
- blood vessel
- hem/o Root
- blood
- phleb/o Root
- vein
- thromb/o Root
- blood clot
- gastr/o Root
- stomach
- hepat/o Root
- liver
- nephr/o Root
- kidney
- neur/o Root
- nerve
- oste/o Root
- bone
- arthr/o Root
- joint
- my/o Root
- muscle
- dermat/o Root
- skin
- ot/o Root
- ear
- rhin/o Root
- nose
- ophthalm/o Root
- eye
- bronch/o Root
- bronchus (large airway)
- thorac/o Root
- chest
- cyt/o Root
- cell
- hist/o Root
- tissue
- hyper- Prefix
- above or excessive
- hypo- Prefix
- under or deficient
- brady- Prefix
- slow
- tachy- Prefix
- fast
- poly- Prefix
- many or excessive
- oligo- Prefix
- few or little
- micro- Prefix
- small
- macro- Prefix
- large
- peri- Prefix
- around
- intra- Prefix
- within
- inter- Prefix
- between
- sub- Prefix
- under
- pre- Prefix
- before
- post- Prefix
- after or behind
- -itis Suffix
- inflammation
- -emia Suffix
- blood condition
- -megaly Suffix
- enlargement
- -penia Suffix
- deficiency or lack
- -pathy Suffix
- disease
- -pnea Suffix
- breathing
- -ectomy Suffix
- removal
- -otomy Suffix
- incision or cutting
- -stomy Suffix
- surgical opening
- -plasty Suffix
- surgical reconstruction
- -scopy Suffix
- examination
- -metry Suffix
- measurement
- -centesis Suffix
- puncture to remove fluid
- -rrhea Suffix
- flow or discharge
- lymph/o Root
- lymph
- splen/o Root
- spleen
- pharyng/o Root
- pharynx (throat)
- laryng/o Root
- larynx (voice box)
- trache/o Root
- trachea (windpipe)
- pneum/o Root
- air or lung
- phren/o Root
- diaphragm
- stomat/o Root
- mouth
- gloss/o, lingu/o Root
- tongue
- bucc/o Root
- cheek
- odont/o Root
- tooth
- gnath/o Root
- jaw
- chol- Root
- bile
- duoden/o Root
- duodenum (first part of the small intestine)
- ile/o Root
- ileum (lower part of the small intestine)
- rect/o Root
- rectum
- proct/o Root
- anus or rectum
- sigmoid/o Root
- sigmoid colon
- sial/o Root
- saliva or salivary gland
- lip/o, adip/o Root
- fat
- gluc/o, glyc/o Root
- glucose or sugar
- hydr/o Root
- water
- fibr/o Root
- fiber
- kary/o Root
- nucleus
- myc/o Root
- fungus
- myx/o Root
- mucus
- py/o Root
- pus
- pyr/o Root
- fever
- lith/o Root
- stone
- ur/o Root
- urine
- -uria Suffix
- in the urine
- cyst/o Root
- bladder or sac
- hyster/o Root
- uterus
- oophor/o, ovari/o Root
- ovary
- orchid/o, orchi/o Root
- testis
- prostat- Root
- prostate
- salping/o Root
- tube
- mamm/o, mast/o Root
- breast
- lact/o Root
- milk
- spermat/o Root
- sperm
- aden/o Root
- gland
- thyr/o Root
- thyroid gland
- hidr/o Root
- sweat
- onych/o Root
- fingernail or toenail
- cephal/o Root
- head
- mening/o Root
- meninges (membranes around the brain and spinal cord)
- myel/o Root
- spinal cord or bone marrow
- psych/o Root
- mind
- acous/o Root
- hearing
- blephar- Root
- eyelid
- irid/o Root
- iris
- lacrim/o Root
- tear (from the eye)
- retin- Root
- retina
- myring/o, tympan/o Root
- eardrum
- chondr- Root
- cartilage
- cost- Root
- rib
- dactyl/o Root
- finger or toe
- pod/o Root
- foot
- spondyl/o Root
- vertebra
- stern- Root
- sternum (breastbone)
- kinesi/o Root
- movement
- morph/o Root
- shape
- cry/o Root
- cold
- therm/o Root
- heat
- phon/o Root
- sound
- phot/o Root
- light
- ton/o Root
- tone, tension or pressure
- cyan/o Root
- blue
- erythr/o Root
- red
- leuk/o Root
- white
- melan/o Root
- black
- xanth/o Root
- yellow
- chrom/o Root
- color
- ab- Prefix
- away from
- ante- Prefix
- before or forward
- circum- Prefix
- around
- dia- Prefix
- across or through
- ecto-, exo- Prefix
- outside or outer
- endo- Prefix
- within or inner
- epi- Prefix
- upon or outside of
- extra- Prefix
- beyond or outside
- infra- Prefix
- beneath or below
- meso- Prefix
- middle
- para- Prefix
- alongside or abnormal
- retro- Prefix
- backward or behind
- supra-, super- Prefix
- above
- trans- Prefix
- across or through
- syn-, sym- Prefix
- together
- bi- Prefix
- two
- diplo- Prefix
- double
- hemi-, semi- Prefix
- half
- homo- Prefix
- same
- iso- Prefix
- equal or alike
- mono-, uni- Prefix
- one
- multi- Prefix
- many
- quadri-, tetra- Prefix
- four
- tri- Prefix
- three
- a-, an- Prefix
- without or lacking
- anti-, contra- Prefix
- against
- auto- Prefix
- self
- hetero- Prefix
- other or different
- neo- Prefix
- new
- pan- Prefix
- all or everywhere
- re- Prefix
- again or backward
- dis- Prefix
- separation or taking apart
- dys- Prefix
- difficult or abnormal
- eu- Prefix
- good or well
- mal- Prefix
- bad or abnormal
- normo- Prefix
- normal
- pseudo- Prefix
- false
- -cyte Suffix
- cell
- -oid Suffix
- resembling
- -ectasis Suffix
- expansion or dilation
- -emesis Suffix
- vomiting
- -ia Suffix
- condition
- -iasis Suffix
- condition or formation of
- -lysis Suffix
- breakdown, destruction or dissolving
- -malacia Suffix
- softening
- -oma Suffix
- tumor
- -osis Suffix
- condition, often abnormal
- -phagia Suffix
- eating or swallowing
- -phasia Suffix
- speech
- -plasia Suffix
- growth
- -plegia Suffix
- paralysis
- -poiesis Suffix
- production
- -ptosis Suffix
- falling or drooping
- -rrhage Suffix
- bleeding
- -sclerosis Suffix
- hardening
- -stasis Suffix
- remaining at a level or unchanging
- -trophy Suffix
- growth
- -desis Suffix
- surgical binding
- -gram, -graph, -graphy Suffix
- recording or written record
- -meter Suffix
- measuring device
- -opsy Suffix
- visual examination
- -pexy Suffix
- surgical fixation
- -rrhaphy Suffix
- suture
- -tripsy Suffix
- crushing
For working interpreters
Put the vocabulary in context.
Move from isolated word parts to careful listening and clarification with our terminology study plan and fictional practice dialogues.
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