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).
Lysine
An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, lysine is present in many proteins and is necessary for optimal growth in childhood. Symbol: Lys
Read the definitionRandom terms
Show more- CA 19-9 A tumor marker initially found in colorectal cancer patients, but subsequently also identified in patients…
- African American An American of black African descent. The term may also be written with a hyphen as African-American. The…
- Surveillance of disease See: Disease surveillance
- Type 1 diabetes See Diabetes, type 1
- Memory, implicit See: Implicit memory
- Myocarditis Myocarditis: Inflammation of the myocardium, the heart muscle. Myocarditis can be caused by a number of…
- Fasciitis, plantar Inflammation of the plantar fascia (fasciitis), the 'bowstring-like' tissue stretching from the heel…
- Translocation 11 childhood leukemia A new type of childhood leukemia in which a piece of chromosome 11 has been translocated (broken off and…
- Factitious disorder by proxy See: Munchhausen syndrome by proxy
- Stricture of the esophagus, chronic A narrowing or closure of the normal opening of the swallowing tube leading to the stomach, usually caused by…
- Priapism Abnormally persistent erection of the penis in the absence of sexual desire. Priapism can occur in persons…
- Valve, bicuspid One of the four valves of the heart, this one is situated between the left atrium and the left ventricle. It…