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, REM
Sleep, REM: 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 quite variable in…
Read the definitionRandom terms
Show more- Daltonism Colorblindness of the red-green type (also known as deuteranopia or deuteranomaly). The term 'Daltonism' is…
- Pectus carinatum Pigeon-breasted. In Latin 'pectus' means 'chest' and 'carina' keel = a chest shaped like the keel of a boat…
- Laser-assisted in situ keratomileusis A kind of laser eye surgery designed to change the shape of the cornea to eliminate or reduce the need for…
- Stereotaxis Use of a computer and scanning devices to create three-dimensional pictures. This method can be used to…
- EMT A rash inside the body. An example: the spots in measles (Koplik's spots) inside the mouth that look like a…
- Kiss A touch or caress with the lips. 'The anatomical juxtaposition of two orbicularis oris muscles in a state of…
- Familial polyposis of entire GI tract See: Juvenile polyposis
- Hypernatremia Elevated blood sodium. Sodium is the major positive ion (cation) in fluid outside of cells. The chemical…
- Bacterial Of or pertaining to bacteria. For example, a bacterial lung infection
- Arterial aneurysm An outpouching (aneurysm) of an artery. As opposed to a venous or cardiac aneurysm. An aneurysm is a…
- Functional hemispherectomy A functional hemispherectomy is a variation of a hemispherectomy, a radical procedure in which one entire…
- Vasoconstriction Narrowing of the blood vessels resulting from contracting of the muscular wall of the vessels. The opposite…