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- Double contrast barium enema A series of x-rays of the colon and rectum taken after the patient is given an enema, followed by an…
- Giant cell tumor of bone A tumor of bone characterized by massive destruction of the end (epiphysis) of a long bone. The site most…
- Retinol >Beta carotene: An antioxidant which protects cells against oxidation damage that can lead to cancer. Beta…
- Adenosine triphosphate An important carrier of energy in cells in the body and a compound that is important in the synthesis (the…
- Glaucoma, normal tension Glaucoma in which the intraocular pressure is normal but there is progressive optic nerve damage and visual…
- Muscle, cardiac A type of muscle with unique features only found in the heart. The cardiac muscle is the muscle of the heart…
- CVS 1. Chorionic villus sampling, a procedure for first-trimester prenatal diagnosis. 2. Cyclic vomiting…
- Hermansky-Pudlak syndrome Abbreviated HPS. A genetic disorder characterized by albinism (with lack of pigment in the skin or eye)…
- Tumor, Wilms See: Wilms tumor
- Endometrium The uterine lining; the cells that line the uterus (the womb); the inner layer of the uterus. This tissue is…
- Dysplasia, faciodigitogenital See: Aarskog-Scott syndrome
- Megrim Migraine. Usually periodic attacks of headaches on one or both sides of the head. Megrim (migraine) may be…