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).
Domain
In molecular biology, a discrete portion of a protein with its own function. The combination of domains in a single protein determines its overall function. (Not to be confused with an Internet domain.)
Read the definitionRandom terms
Show more- Magic bullet Or, sometimes, silver bullet. 1. The perfect drug to cure a disease with no danger of side effects. The term…
- Tracheostomy Tracheostomy: A surgical operation to create an opening (stoma) into the windpipe (the trachea). The opening…
- Galactorrhea The spontaneous flow of milk from the nipple at any time other than during nursing. Galactorrhea can be due…
- Germline mutation Mutation: A heritable change in the DNA that occurred in a germ cell (a cell destined to become an egg or in…
- K (potassium) K is the symbol for potassium, the major positive ion (cation) found inside of cells. The chemical notation…
- Cardiomyopathy, dilated See: Dilated cardiomyopathy
- Intraperitoneal Within the peritoneal cavity, the area that contains the abdominal organs
- Compression, nerve See: Nerve compression
- Immunization, hepatitis B Hepatitis B (hep B) vaccine gives prolonged protection, but 3 shots over a half year are usually required. In…
- Nerve A bundle of fibers that uses chemical and electrical signals to transmit sensory and motor information from…
- Thrombocythemia An abnormally high number of platelets in the blood. Also known as thrombocytosis.
- Superior vena cava A large vein that receives blood from the head, neck, upper extremities, and thorax and delivers it to the…