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).
Twenty-twenty
Perfectly normal vision. From the ability to score 20/20 on the test of visual acuity with the eye chart. This familiar chart, called Snellen's chart after its inventor, is usually read while standing a distance of 20 feet from it. Visual…
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Show more- Uridine monophosphate (UMP) A molecular ion derived from uridylic acid. It has a uracil as its base
- Research, clinical A study of a treatment, procedure, or medication done in a medical setting. See also clinical research trials.
- Grand rounds A formal meeting at which physicians discuss the clinical case of one or more patients. Grand rounds…
- Plantar fasciitis Inflammation of the plantar fascia (fasciitis), the 'bowstring-like' tissue in the sole of the foot…
- Sleep start See: Hypnic jerk
- AVM (arteriovenous malformation) An arteriovenous malformation (AVM) is a congenital disorder (one present at birth) of blood vessels in the…
- Amaurosis fugax A symptom described as a shade coming down over the eye. A partial or complete loss of sight that is…
- Footling presentation There are single-footling or double-footling presentations depending upon whether the presenting part of the…
- Drain, JP See: JP drain
- Inactivation, X chromosome A syndrome of inappropriate secretion of antidiuretic hormone (ADH) which results in the inability to put out…
- Psoralen Any of a number of drugs and other substances containing chemicals that react with ultraviolet (UV) light to…
- Humorism In medicine, humor refers to a fluid (or semifluid) substance. Thus, the aqueous humor is the fluid normally…