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).
Penicillin history
The discovery of penicillin, one of the major events in the history of medicine. In 1871 the scientist Joseph Lister by chance noticed that the mould which grows on cheese and fruit can make microbes (germs) grow weaker. He made some…
Read the definitionRandom terms
Show more- Radial head dislocation See: Nursemaid's elbow
- Endothelial progenitor cell A primitive cell made in the bone marrow that can enter the bloodstream and go to areas of blood vessel…
- Funny bone As in 'it tickled my funny bone.' When the elbow is bumped, the ulnar nerve running past the elbow is…
- Limb-girdle muscular dystrophy See: Muscular dystrophy, limb-girdle
- Line, germ A sequence of cells, each descended from earlier cells in the lineage, which will develop into new sperm and…
- Lymphoma, aggressive See: Aggressive lymphoma
- Vector In medicine, a vector is a carrier. The best way to understand a vector is to recall its origin as a word…
- Roentgen An international unit of X-radiation or gamma-radiation. Abbreviated R. Named for Wilhelm Roentgen
- Squamous intraepithelial lesion A general term for the abnormal growth of squamous cells on the surface of the cervix. The changes in the…
- Lobstein's disease Osteogenesis imperfecta type I. An inherited, generalized connective tissue disorder featuring bone fragility…
- Vasodilation Widening of blood vessels resulting from relaxation of the muscular wall of the vessels. What widens is…
- Ames test A test developed in 1974 by Bruce N. Ames for identifying possible carcinogens by studying their mutagenic…