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
Show more- Node, sinus The sinus node is one of the major elements in the cardiac conduction system, the system that controls the…
- Fibroids Fibroids are common, benign tumors of smooth muscle in the uterus (womb). Uterine fibroids are the most…
- Electron microscope Abbreviated EM. Microscopy in which an electron beam replaces light to form the image. EM has its pluses…
- Agonist maintenance treatment See: Methadone treatment program
- Posteroanterior (PA) In anatomy, posteroanterior (PA) means from back-to-front. For example, a PA X-ray of the chest is taken from…
- Lymphatic tissue A part of the body's immune system that helps protect it from bacteria and other foreign entities. Lymphatic…
- Steppage gait A manner of walking in which the advancing foot is lifted high so that the toes clear the ground. Steppage…
- Disease, hyaline membrane Respiratory disease of the newborn, especially the premature infant, in which a membrane composed of proteins…
- Parathyroid insufficiency See: Hypoparathyroidism
- Inverted repeat A sequence of nucleotides in the DNA that is identical to another except that it has been reversed (inverted)…
- Syndrome, Aase-Smith I See: Aase-Smith syndrome I
- Mental child injury Also known as emotional child abuse, this is the third most frequently reported form of child abuse (after…