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).
Shy-Drager syndrome
A mysterious progressive disorder of the central and sympathetic nervous systems, also called multiple system atrophy with postural hypotension. Postural (or orthostatic) hypotension is an excessive drop in blood pressure when the patient…
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Show more- Osteonecrosis Bone death resulting from poor blood supply to an area of bone. Also known as aseptic necrosis or avascular…
- Snake antivenom See: Snake antivenin. Other spellings: Snake antivenin
- Angina, exudative Angina, exudative: This has nothing whatsoever to do with the usual type of angina (angina pectoris) which is…
- Yolk sac Not all yolk has to do with birds' eggs. Human embryos have a yolk sac, too. The human yolk sac is a membrane…
- Seed implantation Radiation treatment given by placing radioactive material contained within a small cylindrical shell directly…
- HeLa cell One of the cells grown from the cervical cancer of a young African-American woman, Henrietta Lacks. HeLa…
- OS (lens prescription) Abbreviation of 'oculus sinister.' Latin for 'left eye.' By contrast, OD stands for 'oculus dexter' which is…
- National Formulary Full name: United States Pharmacopeia and National Formulary (USP-NF). An official publication, issued first…
- Score, Gleason A grading system for prostate carcinoma. See Gleason score
- Micropenis An abnormally small penis. In medical practice, the dimension of the penis that is measured is the length…
- Nervous system, human The sum total of the tissues that record and distribute information within a person, and does so by…
- Hepatitis, infectious See Hepatitis A