Essential Medical Terminology and Abbreviations
for OET Medicine: What Doctors Must Know
Published by LanguageTest.in | Updated June 2026 | Reading time: 7 minutes
Here is the paradox that catches many doctors in OET: you know far more medical terminology than the average OET candidate — yet your terminology can actually cost you marks in the Writing and Speaking sub-tests if you use it without adapting it for the audience.
OET Medicine tests two distinct vocabulary competencies. The first is passive recognition — understanding complex medical terms in reading and listening texts. The second is active deployment — using appropriate clinical language (or its plain English equivalent) in writing and speaking tasks. This guide covers both, with a focus on what actually matters for scoring B grade and above.
Vocabulary in OET: Where It Actually Matters
The Plain-Language Problem: Your Biggest Vocabulary Challenge
The single most important vocabulary skill for OET Medicine is not knowing more medical words — it is being able to translate the ones you know into plain English for patients. OET Writing and Speaking both penalise candidates who use unexplained medical jargon in patient-facing communication.
*OET rule: When writing a letter to a GP or specialist, clinical terms are acceptable. When writing to a patient (rare, but possible), or in the Speaking role-play with a patient, always use plain English — or explain the term immediately after using it.*
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Put your medical vocabulary to the test with OET Medicine mock exams at — full-length tests using authentic clinical language across all four sub-tests.
Key Abbreviations: What to Expand in OET Writing
Clinical abbreviations are standard in medical notes, but OET Writing tasks require you to expand them when writing a formal letter. Here are the most common abbreviations doctors use — and how to handle them in OET:
Vocabulary for OET Reading: Inference from Context
In OET Reading Part C, one of the most common question types asks about the meaning of a word or phrase in context. Doctors often know the clinical meaning of the word but not the meaning implied by the author in an academic or policy context. Strategies:
- Read the full sentence and the sentence immediately before and after the target word.
- Identify the relationship: Is the author contrasting, supporting, qualifying, or illustrating with this word?
- Substitute each answer option into the sentence and check which preserves the original meaning.
- Be particularly alert to polysemous words — those with both a clinical meaning and a general English meaning (e.g., 'acute,' 'chronic,' 'condition,' 'presentation').
*Example: 'The intervention produced acute improvements in patient outcomes.' Here 'acute' means sudden/rapid — not severe. Without reading in context, a doctor might misread this as 'serious' improvements.*
30 High-Frequency OET Medicine Vocabulary Terms
These terms appear frequently in OET Reading and Listening texts at the B2–C1 level. Many are familiar clinically but require understanding in academic English contexts:
Building Your Vocabulary: A Practical Method
Flashcard drilling of medical terminology lists is ineffective for OET because the exam tests contextual understanding, not isolated definitions. The methods that work:
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- Read a BMJ or NEJM clinical summary daily — note any terms you know clinically but would struggle to explain in plain English to a patient.
- Build a personal 'jargon-to-plain-English' list — add 3 terms per week. Review it before every practice test.
- For abbreviations: write one paragraph of OET letter prose per week expanding all abbreviations you naturally use.
- For Reading vocabulary: when you encounter an unfamiliar word in practice texts, look up its meaning in context — not just its dictionary definition.
Put your medical vocabulary to the test with OET Medicine mock exams at — full-length tests using authentic clinical language across all four sub-tests.
References & Further Reading
- 1OET. (2026). OET Writing assessment criteria — Language criterion. occupationalenglishtest.com
- 1Glendinning, E.H. & Holmstrom, B. (2005). English in Medicine (3rd ed.). Cambridge University Press.
- 1Nation, I.S.P. (2001). Learning Vocabulary in Another Language. Cambridge University Press.
- 1Wyatt, R. (2018). Check Your English Vocabulary for Medicine (5th ed.). Bloomsbury Publishing.