MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
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).
Lumen
A luminous term referring to the channel within a tube such as a blood vessel or to the cavity within a hollow organ such as the intestine. Lumen is a luminous term because it is Latin for light, including the light that comes through a…
Read the definitionRandom terms
Show more- Error of the second kind See: Error, beta
- Electrophysiologic testing of the retina See: Electrophysiologic retinal testing
- Medical prefix A prefix employed in medical terminology. Medical words are often put together, cobbled from two or more…
- Streptococcus haemolyticus Another name for streptococcus pyogenes
- Lyophilize To freeze-dry. The material is rapidly frozen and dehydrated under high vacuum. The process is termed…
- Excessive daytime sleepiness A neurological disorder in which there is a sudden recurrent uncontrollable compulsion to sleep. Excessive…
- Scrub in To wash the hands and forearms very thoroughly, as for surgery. To scrub in implies the use of a brush (and…
- Mucopolysaccharidosis type IIIA Sanfilippo syndrome due to deficiency of the enzyme heparan N-sulfatase. See also: Mucopolysaccharidosis
- Common bile duct The duct that carries bile from the gallbladder and liver into the duodenum (the upper part of the small…
- Disease, variant Creutzfeldt-Jakob Abbreviated vCJD. A human disease thought due to the same infectious agent as bovine spongiform…
- Bile sludge A mixture of microscopic particulate matter in bile that occurs when particles of material precipitate from…
- Proctitis Inflammation of the rectum. This may be due to a considerable number of causes, among them infectious agents…