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.
- 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).
Deficiency, niacin
See: Pellagra
Read the definitionRandom terms
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- Febrile herpes A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and…
- Pleuritis Inflammation of the pleura. When the pleura becomes inflamed, it can produce more than the normal amount of…
- Macula A macula is a small spot. A macula on the skin is a small flat spot while the macula in the eye is a small…
- Ophthalmopathy Any eye disease. External ophthalmopathy may refer to any disease of the eyelid, cornea, conjunctiva, or eye…
- Dressler syndrome Pericarditis (inflammation of the pericardium, the sac-like covering of the heart) after a heart attack…
- Hidrosis Sweating, the production of perspiration. Hidrosis is the Greek word for sweating
- Cervical dysplasia Changes from normal in the cells lining the cervix of the uterus. Cervical dysplasia involves a sequence of…
- Sensation In medicine and physiology, sensation refers to the registration of an incoming (afferent) nerve impulse in…