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, 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- Proton magnetic resonance spectroscopic imaging See: Magnetic resonance spectroscopic imaging
- Cone A type of specialized light-sensitive cell (photoreceptor) in the retina of the eye that provide sharp…
- Palmar surface The palm or grasping side of the hand
- Syndrome, TAR TAR stands for Thrombocytopenia (low blood platelets) and Aplasia (absence) of the Radius (the long bone on…
- Keratin Protein in the upper layer of the skin, hair, nails and animal horns. The word keratin comes from the…
- CpG island In molecular genetics, a short region of DNA rich in CpG sites, often located near the promoters of genes…
- Face, masklike A surgical procedure designed to make the face appear younger by pulling loose facial skin taut. With age or…
- Esophageal cancer Esophageal cancer: A malignant tumor of the esophagus. The risk of cancer of the esophagus is increased by…
- Laryngostasis More commonly known as croup, this is an infection of the larynx, trachea, and the bronchial tubes, that…
- Delusional jealousy See: Othello syndrome
- Grand mal epilepsy See: Grand mal
- Chorioangioma, placental A benign vascular (blood vessel) tumor of the placenta (afterbirth). Large chorioangiomas cause complications…