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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Aortic valve
One of the four valves in the heart, this valve is situated at exit of the left ventricle of the heart where the aorta (the largest of all arteries) begins. The aortic valve lets blood from the left ventricle be pumped up (ejected) into…
Read the definitionRandom terms
Show more- Cyclops A common freshwater crustacean. Some species of Cyclops serve as hosts for parasites such as the guinea worm…
- Mastectomy, simple Removal of one or both breasts, but not the lymph nodes
- Endoscopic retrograde cholangiopancreatography Abbreviated ERCP. A procedure done to diagnose and treat problems in the liver, gallbladder, bile ducts, and…
- Hg Symbol for the metallic element mercury. The abbreviation 'mm Hg' means millimeters of mercury, the height of…
- GJB2 A gene that provides instructions to make a protein called gap junction beta 2. Mutations in the GJB2 gene…
- Teratoma, ovarian Also called a dermoid cyst of the ovary, this is a bizarre tumor, usually benign, in the ovary that typically…
- Q in population genetics The frequency of the less common of two different alternative (allelic) versions of a gene. (The frequency of…
- Lateral meniscus of the knee The word 'meniscus' refers to a crescent-shaped structure. The lateral meniscus of the knee is a thickened…
- Osteochondritis dissecans Osteochondritis dissecans: A condition in which a fragment of bone in a joint is deprived of blood and…
- CNM Certified Nurse-Midwife
- Caenorhabditis elegans genome See: C. elegans genome
- Glaucoma, acute angle-closure Glaucoma, acute angle-closure: Increased pressure in the front chamber (anterior chamber) of the eye due to…