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).
Lys
Lysine. See also: Amino acid symbols
Read the definitionRandom terms
Show more- Orchiopexy Surgery to bring down an undescended testicle
- Emergency postcoital contraception See: Emergency contraception
- Factor V A coagulation factor needed for the normal clotting of blood. Also known as proaccelerin
- Circulatory system The system that moves blood throughout the body. The circulatory system is composed of the heart, arteries…
- Diverticulitis Inflammation of the diverticula (small outpouchings) along the wall of the colon, the large intestine. (One…
- Deficiency, fatty aldehyde dehydrogenase Also known as the Sjogren-Larsson syndrome, this is a genetic (inherited) disease usually characterized by a…
- Disease, hydroxyapatite crystal The inflammation caused by hydroxyapatite crystals has been referred to as hydroxyapatite crystal disease…
- Cranial nerve, fourth The fourth cranial nerve, the trochlear nerve, is the nerve supply to the superior oblique muscle of the eye…
- Pain, chest See: Chest pain
- EGD Epidermal growth factor. A polypeptide (small protein) that is a powerful mitogen. (It stimulates cells to…
- Sequence, draft DNA Sequence of a DNA with less accuracy than a finished sequence. In a draft sequence, some segments are missing…
- Restriction site A sequence in DNA that can be recognized and cut by a specific restriction enzyme.