MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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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, rapid eye movement
Sleep, rapid eye movement: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM sleep. We typically have 3 to 5 periods of REM sleep per night. They occur at intervals of 1-2 hours and are…
Read the definitionRandom terms
Show more- Vertebral compression fracture One of the last two ribs. A rib is said to be "vertebral" if it does not attach to the sternum (the breast…
- Glans and foreskin, inflammation of the In the uncircumcised male, balanitis (inflammation of the glans, the rounded head of the penis) and posthitis…
- Phimosis A condition whereby the foreskin of the penis is too tight. The penis itself consists of a cylindrical shaft…
- D- Abbreviation for dextrorotatory, applied to a chemical compound. Dextrorotary is opposed to levorotary which…
- Chlorobenzylidenemalononitrile A riot control agent or 'tear gas.' See: Riot control agent poisoning
- Granny cam A camcorder (a video camera and video recorder in one unit) that displays a live feed of elderly people, as…
- Transplantation genetics The field of biology and medicine relating to the genes that govern the acceptance or rejection of a…
- Heart attack Heart attack: The death of heart muscle due to the loss of blood supply. The loss of blood supply is usually…
- Reagent A substance used to produce a chemical reaction to detect, measure, produce, etc. other substances
- C. botulinum Clostridium botulinum
- ATN Acute tubular necrosis
- Pouch, Pavlov At different points along the dogs' digestive tracts, the Russian physiologist Ivan Petrovich Pavlov…