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- Bottlefeeding The use of a substitute for breast milk for feeding infants. Pediatricians generally advise exclusively…
- Erythrodermic psoriasis A particularly inflammatory form of psoriasis that often affects most of the body surface. It is the least…
- Guanine One of the four bases in DNA that make up the letters ATGC. Guanine is the 'G'. The others are adenine…
- Eructation Better known as burping or belching. Casting up wind (expelling air) from the stomach through the mouth
- Zeitgeber An environmental agent or event that provides the cue for setting or resetting a biological clock. To be…
- Pyelogram X-ray study of the kidney especially showing the pelvis (urine-collecting basin) of the kidney and the ureter.
- Arteriovenous malformation (AVM) A serious disease characterized by inflammation of the walls of the blood vessels (vasculitis). The vessels…
- Nude mouse A mutant mouse said to be nude because it is hairless due to the presence two copies of the gene 'nu' (for…
- Sulfonamides The sulfa-related group of antibiotics, which are used to treat bacterial infection and some fungal…
- Discordant 1. Showing discordance, lack of agreement. A couple may be discordant for a sexually transmitted infection…
- Aplasia Failure to develop. If something develops and then wastes away, that is atrophy.
- Primary liver cancer, adult A tumor in which the cancer starts during adulthood in cells in the liver. Also called hepatocellular…