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).
Sleep
Sleep: The body's rest cycle. Sleep is triggered by a complex group of hormones that are active in the main, and that respond to cues from the body itself and the environment. About 80 percent of sleep is dreamless, and is known as…
Read the definitionRandom terms
Show more- Mimetic The adjective for 'mimesis' -- imitation or mimicry. A radiomimetic drug is one that imitates the effects of…
- Hemophilia A group of inherited bleeding disorders in which the ability of blood to clot is impaired. See: Hemophilia A…
- Syncope The temporary loss of consciousness upon coughing. Syncope is the temporary loss of consciousness or, in…
- Smallpox bioterrorism The misuse of smallpox as an agent of bioterrorism. Smallpox was eradicated in 1977. Routine vaccinations…
- Mediterranean-style diet See: Mediterranean diet
- Psoralen Any of a number of drugs and other substances containing chemicals that react with ultraviolet (UV) light to…
- Vaccine, Sabin polio See: Polio vaccine, oral
- Hexosaminidase A An enzyme which, when deficient, causes Tay-Sachs disease, a progressive fatal neurologic disorder…
- Ephelides The plural of ephelis, a type of freckle. Ephelis and ephelides are among the many medical terms that are…
- Polony A tiny colony of DNA, about one micron in diameter. The word 'polony' is a contraction of 'polymerase…
- Cast 1) A protective shell of plaster and bandage molded to protect a broken or fractured limb as it heals. 2) An…
- Proxy, health care A health care proxy is one form of advance medical directive. Advance medical directives pertain to treatment…