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 B -- nicotinic acid
Deficiency of nicotinic acid (also known as niacin), one of the B-complex vitamins, causes pellagra. Pellagra was known as the 'disease of the four D's' -- dermatitis, diarrhea, dementia and death. The disease is specifically characterized…
Read the definitionRandom terms
Show more- Disease, new variant Creutzfeldt-Jakob Abbreviated nvCJD. A human disease thought due to the same infectious agent as bovine spongiform…
- Islet cell carcinoma See: Islet cell cancer
- Sciatica Sciatica: Pain resulting from irritation of the sciatic nerve, typically felt from the low back to behind the…
- Toco- Prefix meaning childbirth. For example, tocolysis is the slowing or halting of labor. Sometimes spelled tok-…
- JAK3 Or Jak3. An enzyme found only in cells in the immune system that is critical for the cell signaling process…
- Protein C A vitamin K-dependent protein in plasma that enters into the cascade of biochemical events leading to the…
- Dystonia, Segawa Dystonia, Segawa: An important variant form of dopa-responsive dystonia (DRD). DRD typically begins in…
- Rock (drug) A street name given to cocaine that has been processed from cocaine hydrochloride to a ready-to-use free base…
- Cervical rib >True ribs: The first seven ribs attach to the sternum (the breast bone) in the front and are known as true…
- Traveler's diarrhea Traveler's diarrhea: Diarrhea that results from infections acquired while traveling to another country. Among…
- Bacteria Single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites…
- Cryocardioplegia Paralysis of the heart by cold (hypothermia)