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).
Vitamin B3
Vitamin B3 is niacin. Deficiency of niacin causes pellagra. Pellagra was known as the 'disease of the four D's' -- dermatitis, diarrhea, dementia and death. The disease is specifically characterized by: > >Dermatitis: A rash on areas of…
Read the definitionRandom terms
Show more- Gynecoid pelvis The gynecoid pelvis is one that is generally characteristic of a woman in its bone structure and therefore…
- DNR Do not resuscitate. See also Advance medical directives
- Vaginal fornix The anterior (front) and posterior (back) recesses into which the upper vagina is divided. These vaultlike…
- Sclero- Pertaining to both the sclera and the conjunctiva. The sclera, a tough white outer coat that covers most of…
- Homozygosity The state of possessing two identical forms of a particular gene, one inherited from each parent. For…
- Single transverse palmar line Simian crease
- Thrombin A key clot promoter, thrombin is an enzyme that presides over the conversion of a substance called fibrinogen…
- Anaplastology The art and science of restoring a malformed or absent part of the human body through artificial means. An…
- Syndrome, lipodystrophy A disturbance of lipid (fat) metabolism that involves the partial or total absence of fat and often the…
- Prophylactic cranial irradiation Radiation therapy to the head intended to prevent cancer from spreading (metastasizing) to the brain.
- Cysticercosis An infection caused by the pork tapeworm, Taenia solium. Infection occurs when the tapeworm larvae enter the…
- Aortic dissection Aortic dissection: A progressive tear in the aorta. The inner lining (intima) of the aorta tears and blood…