Medical terminology looks like a foreign language the first time you open a chart. The good news: it is a system. Almost every long word is a short set of Greek or Latin pieces glued together, and the pieces repeat. This guide shows the pieces, how to put them together, and a realistic study plan for adults learning part-time.
Why terminology matters in an office role
The National Occupational Classification lists duties for medical administrative assistants that include scheduling and confirming medical appointments, entering and formatting medical reports and correspondence, completing insurance and other claim forms, interviewing patients to complete forms, and maintaining confidential medical files. Each of these puts you in front of clinical vocabulary. A misspelled medication, a swapped left and right, or the wrong body part on a requisition can cause real delays. Clinics keep these records in an electronic medical record (EMR), where the same terms are typed, searched and filed every day.
Where medical vocabulary gets used at work
This data describes the medical administrative assistant occupation in Alberta. It is not what Ucademy students will earn or where they will be hired.
Source: Job Bank, medical administrative assistant in Alberta · Wages updated November 19, 2025; outlook 2025-2027 updated December 10, 2025.
- Ambulatory health care services (clinics and offices) 61%
- Hospitals 28%
- All other sectors 11%
Job Bank also reports that 38% of people in this job hold a college certificate or diploma as their highest credential, against 19% across all occupations. Job Bank lists the job as not regulated in Canada, so no professional exam is required.
Source: Job Bank outlook, NOC 13112 · updated December 10, 2025.
Data checked October 19, 2026: Job Bank outlook (updated December 10, 2025), Job Bank wages page for benefits (updated November 19, 2025), National Occupational Classification 2021.
The three building blocks
Take the word gastritis. Gastr is a root meaning stomach, and -itis is a suffix meaning inflammation. So gastritis is inflammation of the stomach. Many roots take a connecting vowel, usually o, which is why you see forms such as gastr/o. The pieces below are standard word parts found in any medical terminology textbook.
Common prefixes
| Prefix | Meaning | Example |
|---|---|---|
| a-, an- | without | anemia |
| brady- | slow | bradycardia |
| tachy- | fast | tachycardia |
| dys- | difficult, painful, abnormal | dysphagia |
| hyper- | above, excessive | hypertension |
| hypo- | below, deficient | hypoglycemia |
| peri- | around | pericardium |
| post- | after | postoperative |
Common roots
| Root | Meaning | Example |
|---|---|---|
| arthr/o | joint | arthroscopy |
| cardi/o | heart | cardiology |
| dermat/o | skin | dermatitis |
| gastr/o | stomach | gastritis |
| hepat/o | liver | hepatomegaly |
| nephr/o | kidney | nephrectomy |
| neur/o | nerve | neuropathy |
| oste/o | bone | osteoarthritis |
Common suffixes
| Suffix | Meaning | Example |
|---|---|---|
| -algia | pain | neuralgia |
| -ectomy | surgical removal | appendectomy |
| -itis | inflammation | hepatitis |
| -ology | study of | cardiology |
| -megaly | enlargement | hepatomegaly |
| -pathy | disease | neuropathy |
| -plasty | surgical repair | arthroplasty |
| -scopy | visual examination | arthroscopy |
Try decoding hypoglycemia: hypo- (below), glyc (sugar) and -emia (a blood condition). Low blood sugar. Then nephrectomy: kidney plus surgical removal. The same order works for almost any term:
- 1Read the suffix first
It usually names the condition or procedure. In nephrectomy the suffix is -ectomy: surgical removal. - 2Find the root
The root names the body part. Nephr/o is the kidney. - 3Look for a prefix
A prefix adds size, speed, position or amount. Nephrectomy has none; hypoglycemia starts with hypo-, meaning below. - 4Read it back in plain words
Nephrectomy: surgical removal of a kidney. Hypoglycemia: below-normal sugar in the blood.
Words that look alike but are not
Sound-alike pairs are a classic source of chart errors. Learn these early:
- Hypotension and hypertension. Low blood pressure and high blood pressure.
- Ileum and ilium. A part of the small intestine and a hip bone.
- Dysphagia and dysphasia. Difficulty swallowing and difficulty with speech or language.
- Ureter and urethra. The tube from kidney to bladder and the tube that carries urine out of the body.
- Mucus and mucous. The noun and the adjective: mucus is the substance, mucous membrane is the tissue.
Directions and positions
Clinical notes use direction words that office staff see on requisitions and referrals. Anterior is the front and posterior the back. Superior is above and inferior below. Medial means toward the midline of the body and lateral away from it. Proximal is closer to the point of attachment and distal farther away. Left and right always mean the patient’s left and right.
Body systems and the specialists you will schedule
Office staff meet terminology most often through referrals and appointments. Matching a body system to its roots and its specialist makes those documents easier to read:
- Heart and blood vessels: cardi/o and vascul/o. A cardiologist treats heart conditions.
- Lungs and breathing: pulmon/o. A pulmonologist treats lung conditions.
- Stomach and bowel: gastr/o. A gastroenterologist treats the digestive system.
- Kidneys and urinary tract: nephr/o and ur/o. A nephrologist treats kidney disease; a urologist treats the urinary tract.
- Bones, joints and muscles: oste/o, arthr/o and my/o. Orthopedic and rheumatology clinics see these patients.
- Brain and nerves: neur/o. A neurologist treats nervous system conditions.
- Skin: dermat/o. A dermatologist treats skin conditions.
Spelling and pronunciation tips
Some letters are silent at the start of a word: the p in pneumonia and psychiatry is not pronounced. The letters ph usually sound like f, as in pharmacy. Learn to say each word aloud, because you will hear it on the phone before you ever see it written. When you take a message, spell the term back to the caller if you are unsure.
A useful habit is to practise on real material. Read your own appointment letters, lab requisitions or after-visit summaries, underline every unfamiliar word and decode it into its parts. Ten minutes of that teaches more than a page of flash cards.
A six-week study plan
| Week | Focus | Target |
|---|---|---|
| 1 | Suffixes for conditions and procedures | 10 suffixes |
| 2 | Prefixes of size, speed and position | 10 prefixes |
| 3 | Roots for the heart, lungs and blood | 10 roots |
| 4 | Roots for the digestive and urinary systems | 10 roots |
| 5 | Roots for bones, muscles, nerves and skin | 10 roots |
| 6 | Review, sound-alike pairs and directions | Decode 30 words |
Twenty minutes a day beats a weekend cram. Use flash cards, say the words aloud, and decode every unfamiliar term you meet instead of skipping it. Check spellings against a reliable medical dictionary, because one wrong letter can change the meaning.
Abbreviations that must not be used for medications
Medical notes are full of abbreviations, and some are easy to misread. ISMP Canada, a national medication-safety organization, publishes a “Do Not Use” list of abbreviations that have been involved in harmful medication errors. Its own wording is that they should never be used when communicating medication information.
| Written as | Intended meaning | Why it is dangerous | Write instead |
|---|---|---|---|
| U | unit | Mistaken for 0, 4 or cc | unit |
| IU | international unit | Mistaken for IV or 10 | unit |
| QD | every day | Mistaken for QOD, for qid, or the Q read as 2 | daily |
| D/C | discharge | Read as “discontinue whatever medications follow” | discharge |
| cc | cubic centimetre | Mistaken for u (units) | mL |
| X.0 mg | a trailing zero | The decimal point is overlooked, which can cause a 10-fold dose error | X mg |
Source: ISMP Canada, Dangerous Abbreviations, Symbols and Dose Designations (© 2006, reaffirmed 2018). The list is for medication information.
Many clinics and health authorities keep their own approved and banned lists as well. Follow your employer’s lists, ask when you are unsure, and never guess.
If you want structured study, our guide to becoming a medical office assistant in Alberta and the comparison of medical office assistant and unit clerk roles show where terminology fits in the career. The Medical Office Assistant & Unit Clerk Certificate page lists the 516 hours of courses.
Sources
- National Occupational Classification 2021: 13112 Medical administrative assistants
- Job Bank: Medical administrative assistant in Alberta, job prospects
- Job Bank: Medical administrative assistant in Alberta, wages and benefits
- Job Bank: Medical administrative assistant in Alberta, requirements
- ISMP Canada: Dangerous Abbreviations, Symbols and Dose Designations (Do Not Use list)