MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Topoisomerase
A class of enzymes that alter the supercoiling of double-stranded DNA. (In supercoiling the DNA molecule coils up like a telephone cord, which shortens the molecule.) The topoisomerases act by transiently cutting one or both strands of the…
Read the definitionRandom terms
Show more- Injury, hangman (Hangman's fracture) Injury to one of the two crescent-shaped cartilage pads between the two joints formed by the femur (the thigh…
- Smallpox vaccination of fetus See Congenital vaccinia
- Psoralen Any of a number of drugs and other substances containing chemicals that react with ultraviolet (UV) light to…
- Acute pancreatitis Sudden inflammation of the pancreas. The pancreas abruptly becomes inflamed and then gets better. Some people…
- Subject As a noun:1. A branch of learning that forms a course of study. In medical school, one of the subjects…
- Inguinal orchiectomy Surgery to remove the testicle, with the incision made through the groin.
- X, factor A coagulation factor, a substance in blood essential to the normal clotting process. Production of factor X…
- EMT A rash inside the body. An example: the spots in measles (Koplik's spots) inside the mouth that look like a…
- Genotoxin A poisonous substance which damages DNA. A genotoxin can cause mutations in DNA (and so be a mutagen), it can…
- Cancer, uterine See: Uterine cancer
- Stent A tube designed to be inserted into a vessel or passageway to keep it open. Stents are inserted into narrowed…
- Thyroid insufficiency See: Hypothyroidism