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).
Acrochordon
A small tag of skin that may have a stalk (a peduncle). An acrochordon may appear on skin anywhere although the favorite locales are the eyelids, neck, armpits (axillae), upper chest, and groin. Invariably benign, this tiny tumor of the…
Read the definitionRandom terms
Show more- Pauling-Corey helix The alpha helix, the structure of most proteins, discovered by Linus Pauling and Robert Corey. See: Alpha…
- Cystinosis A genetic disease characterized by the widespread deposition of the amino acid cystine in cells due to a…
- Aplasia Failure to develop. If something develops and then wastes away, that is atrophy.
- Disease, Crohn A chronic inflammatory disease primarily involving the small and large intestine but which can affect other…
- Blot, Northern A technique in molecular biology, used mainly to separate and identify pieces of RNA. Called a Northern blot…
- Me-too drug A drug that is structurally very similar to already known drugs, with only minor differences. The term…
- Dilatation The process of enlargement or expansion. For example, dilatation of the eye is the process by which the pupil…
- Difficult urination See: Dysuria
- Hole, macular A hole in the macula, the tiny oval area made up of millions of nerve cells located at the center of the…
- Pleural space The tiny area between the two layers of the pleura (the thin covering that protects and cushions the lungs)…
- Focal motor seizure A simple partial seizure with localized motor activity. There may be spasm or clonus (jerking) of one muscle…
- Microscope, fluorescent See: Fluorescent microscope