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).
Vasoconstriction
Narrowing of the blood vessels resulting from contracting of the muscular wall of the vessels. The opposite of vasodilation
Read the definitionRandom terms
Show more- Gray A unit of absorbed radiation equal to the dose of one joule of energy absorbed per kilogram of matter, or 100…
- Arteriosclerotic aneurysm A localized widening (aneurysm) of a vessel that occurs because the vessel wall is weakened by…
- Hemochromatosis Hemochromatosis (iron overload) is an inherited disorder in how the body absorbs and stores iron. The excess…
- UTI in children See: Urinary tract infection in children
- Arteritis, giant cell A chronic vascular disease, most often involving the carotid artery system, that can lead to blindness and/or…
- Vaccination, chickenpox See Chickenpox immunization
- Cryo-electron microscopy An electron microscopic technique that involves freezing the biological sample in order to view the sample…
- Syndemic A set of linked health problems involving two or more afflictions, interacting synergistically, and…
- Pituitary gland The main endocrine gland. It is a small structure in the head. It is called the master gland because it…
- Thrive, failure to (FTT) Refers to a child whose physical growth is significantly less than that of peers. There is no official…
- Perchloric acid See: Perchlorate
- ALOX5AP Arachidonate 5-lipoxygenase-activating protein. See: FLAP