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).
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- Hyperglycemia Hyperglycemia: A high blood sugar. An elevated level specifically of the sugar glucose in the blood…
- Embryo The organism in the early stages of growth and differentiation from fertilization to, in humans, the…
- Pituitary adenoma A benign tumor of the pituitary, the master gland that controls other glands and influences numerous body…
- Esophagogastric tamponade A procedure in which a balloon is inflated within the esophagus and stomach to apply pressure on bleeding…
- UV radiation Ultraviolet radiation. Invisible rays that are part of the energy that comes from the sun, can burn the skin…
- Nails, white spots on the Very small semi-circular white spots on the nails. These spots may be found on the fingernails and…
- Noncompliance The failure or refusal to comply: the failure or refusal to conform and adapt one's actions to a rule or to…
- Sign, Gottron A scaly, patchy redness over the knuckles seen in patients with dermatomyositis, an inflammatory muscle…
- Lunule 1. The crescent-shaped area at the base of a fingernail or toenail. 2. Any small crescent- or moon-shaped…
- Tocolytic Relating to the inhibition of labor, delaying or halting labor
- PARK3 Familial Parkinson disease type 3
- CREST syndrome A limited form of scleroderma, a disease of connective tissue with the formation of scar tissue (fibrosis) in…