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).
Unit, international (IU)
An international unit (IU) is an internationally accepted amount of a substance. This type of measure is used for the fat-soluble vitamins (such as vitamins A, D and E) and certain hormones, enzymes, and biologicals (such as vaccines). The…
Read the definitionRandom terms
Show more- Lumen A luminous term referring to the channel within a tube such as a blood vessel or to the cavity within a…
- Calcaneal spur A bony spur projecting from the back or underside of the heel bone (the calcaneus) that often makes walking…
- Selenosis Selenium poisoning. Selenium posioning may be acute (short-term) or chronic (long-term). The effects of acute…
- Vaccine, inactivated polio See: Polio vaccine, inactivated
- Fever, relapsing See: Relapsing fever
- Color hearing A form of chromesthesia in which hearing a musical tone elicits the perception of a color. In one case, an…
- Human herpesvirus 2 (HHV-2) A herpes virus that causes genital herpes, characterized by sores in the area of the genitalia. Genital…
- Vaccine, live polio See: Polio vaccine, oral
- Progressive cardiomyopathic lentiginosis See: LEOPARD syndrome
- Filial 1. In genetics, the first generation that results from the crossing of two parental lines, as the filial…
- Curare A muscle relaxant used in anesthesia (and, in the past, in arrow poisons by South American Indians). Curare…
- Pacemaker Pacemaker: A system that sends electrical impulses to the heart in order to set the heart rhythm. The…