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.
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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).
Atresia, aortic
Congenital absence of the normal valvular opening from the left ventricle of the heart into the aorta. 'Atresia' here refers to the absence of a normal opening.
Read the definitionRandom terms
Show more- Gigantism Excessive growth both in height and specific body parts. Gigantism with extreme height may be associated with…
- Carbon monoxide on houseboats See: Houseboat carbon monoxide poisoning
- Syringoma A benign (non-cancerous) skin tumor that derives from eccrine cells, specialized cells that are related to…
- Gallus gallus The Red Jungle Fowl, the ancestor of domestic chickens
- Headache, chronic daily See: Chronic daily headache
- Neisseria Group of bacteria that includes the cause of gonorrhea.
- Sphygmomanometer An instrument for measuring blood pressure, particularly in arteries. The two types of sphygmomanometers are…
- Failure, autonomic See: Autonomic failure
- Protease An enzyme that can split a protein into peptides (from which the protein was originally created).
- Quaque die (on prescription) Seen on a prescription, qd (or, written with periods, q.d.) means one a day (from the Latin quaque die). The…
- Amino acid, nonessential An amino acid that can be made by humans and so is not essential to the human diet. There are 11 nonessential…
- Pimecrolimus Pimecrolimus: A chemical used to treat atopic dermatitis (eczema). Pimecrolimus prevents the activation of T…