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).
Autonomic failure
Malfunction of the autonomic nervous system due to imbalance between the sympathetic and parasympathetic divisions of that sector of the nervous system
Read the definitionRandom terms
Show more- Headache, migraine See migraine headache.
- Gorlin syndrome II Name sometimes used for the LEOPARD syndrome which Dr. Robert J. Gorlin and colleagues recognized and…
- Superior vena cava A large vein that receives blood from the head, neck, upper extremities, and thorax and delivers it to the…
- Vein, portal A large vein that carries blood from the stomach and the intestines to the liver. The portal vein is formed…
- PARK11 Familial Parkinson disease type 11
- DES Diethylstilbestrol, the earliest synthetic (man-made) form of a hormone in the estrogen class. DES was once…
- Mortality rate, maternal The number of maternal deaths related to childbearing divided by the number of live births (or by the number…
- Rectal bleeding Rectal bleeding: Blood passed rectally. Blood in the stool can be bright red or maroon in color. Larger…
- Sick building syndrome Sick building syndrome: A condition caused by exposure to various noxious agents that affect persons employed…
- Delusion A false personal belief that is not subject to reason or contradictory evidence and is not explained by a…
- Skull The skull is a collection of bones which encase the brain and give form to the head and face. The bones of…
- ABCD rating A staging system for prostate cancer. See the Jewett staging system