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.
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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).
St. Louis encephalitis
A disease caused by a virus (first observed in Illinois in 1932) transmitted from birds to the common Culex mosquito to people. St. Louis encephalitis occurs typically in the summer and early fall. In the U.S., the virus is rarely found…
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Show more- Cranial nerve, sixth The sixth cranial nerve is the abducent nerve. It is a small motor nerve that has one task: to supply a…
- Beau's lines Transverse lines or grooves across the fingernails; transverse depressions in the nail plate. Beau's lines…
- Prostaglandin E2 One of the prostaglandins, a group of hormone-like substances that participate in a wide range of body…
- Angiotensin receptor blocker See: Angiotensin II receptor blocker
- Rickettsia A member of a group of microorganisms that (like viruses) require other living cells for growth but (like…
- False positive A result that is erroneously positive when a situation is normal. An example of a false positive: a…
- Clinical 1. Having to do with the examination and treatment of patients. 2. Applicable to patients. A laboratory test…
- Selenocysteine An amino acid in which selenium takes the place of sulfur in the amino acid cysteine. Its formula is…
- Nictitating spasm Spasm of the eyelid with continuous winking. To nictitiate is to wink. 'Nictitate' and the older verb…
- Oneself, fear of An irrational fear of oneself, an intense self-fear that is groundless. Fear of oneself is termed…
- Test, carcinoembryonic antigen See: Carcinoembryonic antigen
- Hounsfield 1. Godfrey Hounsfield, a key contributor to the creation of the CAT scanner.2. The unit measuring the…