MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
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).
Urethral sphincter
>Internal sphincter: Part of the muscular bladder wall acts as the internal urethral sphincter and prevents urine from leaving the bladder to enter the urethra. This sphincter cannot be willfully controlled but is under automatic…
Read the definitionRandom terms
Show more- Trichinosis Trichinosis: See: Trichinellosis.
- Microsurgery Surgery through a microscope. Microsurgery is used to operate on very small structures, often requires…
- Erythrasma A chronic superficial slowly spreading skin infection, especially in the folds of the body and webs between…
- Poisoning, sea An intensely itchy rash due to contact with the tiny thimble jellyfish (Linuche unguiculata). These jellyfish…
- Radius In anatomy, the radius is the smaller of the two bones on the thumb side of the forearm. (The bigger one is…
- Thorn test An early test for Addison's disease. The test is named for Dr. George W. Thorn who devised it. See: Thorn…
- Abuse, pregnancy Abuse of an expectant mother. This abuse is most often perpetrated by the woman's spouse, partner, or…
- Spider veins A group of widened veins that can be seen through the surface of the skin. Their wheel-and- spoke shape…
- Japanese encephalitis A mosquito-borne viral infection, the leading cause of viral encephalitis in Asia. Japanese encephalitis…
- Synaptic cleft The tiny space between two nerve cells across which the neurotransmitter acetylcholine diffuses
- SGOT Serum glutamic oxaloacetic transaminase, an enzyme that is normally present in liver and heart cells. SGOT is…
- Genome, Bos taurus See: Bovine genome