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- Periaortic Around the aorta. The aorta is the great artery that comes from the left ventricle of the heart and delivers…
- Agita Heartburn, acid indigestion, an upset stomach or, by extension, a general feeling of upset. The word is…
- Virus, lymphadenopathy Another name for the human immunodeficiency virus (HIV), the cause of AIDS. Please see: Virus, human…
- Speech-language pathologist A specialist who evaluates and treats communication disorders and swallowing problems. A speech-language…
- Babinski sign An important neurologic examination based upon what the big toe does when the sole of the foot is stimulated…
- CBER Center for Biologics Evaluation & Research: Part of the FDA (the US Food & Drug Administration)
- Congenital anomaly Something that is unusual or different at birth. A minor anomaly is defined as an unusual anatomic feature…
- Cold sore A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and…
- DEA Every prescription written in the United States bears a DEA number, that of the prescribing doctor, the DEA…
- Fiber, elastic See: Elastic fiber
- Exanthem subitum Means a sudden rash. A viral disease of infants and young children with sudden onset of high fever which…
- Hypnic 1. Inducing sleep. 2. Pertaining to sleep. A hypnic jerk is a sleep start or jerk. From the Greek hypnikos…