Medical jargon is the specialized vocabulary doctors use for precision with each other — Latin- and Greek-rooted terms, abbreviations, and shorthand that rarely appear in everyday speech. Common examples include -itis (inflammation), -ectomy (surgical removal), benign (not cancerous), acute (sudden), chronic (long-lasting), and PRN (take as needed). Each term has a plain-English equivalent that means the same thing.
Your doctor speaks a different language. Not because they are trying to confuse you — but because medical terminology was designed for precision between clinicians, not clarity for patients.
Here is your translation guide to the terms you are most likely to run into.
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Why do doctors use medical jargon?
Most medical terms come from Latin and Greek roots, which lets clinicians be exact and consistent — the same word means the same thing in any hospital, in any country. That precision genuinely matters for safe care.
But precision for doctors should not mean confusion for you. You deserve to understand your own health in words that make sense. So here is the plain-English version.
Body systems and common terms
Cardiovascular — heart & blood vessels
Terms about your heart, blood pressure and circulation.
Hypertension
High blood pressure.
Tachycardia
Heart beating too fast.
Bradycardia
Heart beating too slow.
Arrhythmia
Irregular heartbeat.
Edema
Swelling from fluid building up in the body.
Angina
Chest pain from reduced blood flow to the heart.
Myocardial infarction
A heart attack.
Atherosclerosis
Hardening and narrowing of the arteries.
Respiratory — lungs & breathing
Terms about your lungs and how you breathe.
Dyspnea
Shortness of breath.
Hypoxia
Low oxygen in the blood.
Pneumonia
A lung infection.
COPD
Chronic lung disease, often from smoking or pollution.
Bronchitis
Inflammation of the airways.
Tachypnea
Breathing too fast.
Apnea
Temporarily stopping breathing.
Neurological — brain & nerves
Terms about your brain, nerves and balance.
CVA / Stroke
A brain attack — blood supply to part of the brain is cut off.
TIA
A mini stroke — temporary, with no lasting damage.
Syncope
Fainting.
Vertigo
Severe dizziness, with a spinning sensation.
Neuropathy
Nerve damage causing pain, tingling or numbness.
Altered mental status
Confusion or a change in behavior or awareness.
Seizure
Abnormal electrical activity in the brain.
Gastrointestinal — stomach & digestion
Terms about your gut and digestive system.
Nausea
Feeling sick to your stomach.
Emesis
Vomiting.
Dysphagia
Difficulty swallowing.
GERD
Acid reflux — stomach acid coming back up.
Colitis
Inflammation of the colon.
Ileus
The bowel has stopped moving temporarily.
Melena
Black, tarry stool that can indicate bleeding.
Musculoskeletal — bones & muscles
Terms about your bones, joints and muscles.
Fracture
A broken bone.
Contusion
A bruise.
Laceration
A cut or tear in the skin.
Sprain
A stretched or torn ligament.
Strain
A stretched or torn muscle.
Arthritis
Joint inflammation.
Osteoporosis
Weak, brittle bones.
Severity and urgency terms
Acute
Sudden and severe.
Chronic
Long-lasting and ongoing.
Benign
Not harmful or cancerous.
Malignant
Cancerous or harmful.
Idiopathic
No known cause.
Prognosis
The expected outcome.
Palliative
Focused on comfort rather than cure.
Prophylactic
Preventive treatment.
What do prescription abbreviations mean?
QDOnce daily
BIDTwice daily
TIDThree times daily
QIDFour times daily
PRNAs needed
POBy mouth
SQ / SubQInjection under the skin
IMInjection into the muscle
IVInto the vein
QHSAt bedtime
NPONothing by mouth
mgMilligrams
mcgMicrograms
mLMilliliters
Procedure and test terms
Biopsy
Removing a small tissue sample to test it.
CT scan
A detailed X-ray that shows cross-sections of the body.
MRI
Magnetic imaging that shows soft tissues in detail.
Ultrasound
Imaging made with sound waves.
EKG / ECG
A recording of your heart’s electrical activity.
Echocardiogram
An ultrasound of the heart.
Endoscopy
A camera passed down the throat to see the stomach.
Colonoscopy
A camera passed into the colon to check for polyps.
Angiogram
An X-ray of blood vessels using a dye.
Lumbar puncture
A spinal tap — fluid is taken from around the spine.
How Nuvela AI helps
A glossary helps when you already know which word to look up. But a real medical document throws dozens of these terms at you at once, tangled together in long sentences — and looking each one up is slow and easy to get wrong.
Instead, upload the whole document to Nuvela AI and get every term translated in context at once — your diagnosis, medications, results and instructions explained together, in plain English, in seconds.
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Medical disclaimer: These plain-English definitions are educational and simplified — they are not medical advice, diagnosis or treatment. Always rely on your licensed healthcare provider for what a term means in your specific situation. Call 911 in an emergency.