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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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- Atonia, REM sleep Sleep : A frightening form of paralysis that occurs when a person suddenly finds himself or herself unable to…
- Neuroendocrine Having to do with neuroendocrinology: the interactions between the nervous system and the endocrine system
- Machine, continuous passive motion machine A machine used to help rehabilitate a limb (an arm or leg). The continuous passive motion (CPM) machine is…
- Internal ear There are three sections of the ear. They are the external ear, the middle ear, and the internal ear. The…
- Chordae tendineae Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves…
- MND Motor neuron disease
- Ventricular Pertaining to the ventricles, the lower chambers of the heart, as in ventricular fibrillation and ventricular…
- Syndrome, mucocutaneous lymph node A syndrome of unknown origin, mainly affecting young children. It causes fever, reddening of the eyes…
- Biomarker A biochemical feature or facet that can be used to measure the progress of disease or the effects of treatment
- Seizure, automatic See: Automatic seizure
- Trichuriasis Infection with the human whipworm, a nematode (roundworm) formally known as Trichuris trichiura. The third…
- Kindercam See: Kiddie cam