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- Vaccinia, progressive See Progressive vaccinia
- Malattia leventinese An hereditary form of macular degeneration that results in progressive and irreversible visual loss. This…
- Hemorrhage, subarachnoid Bleeding within the head into the space between two membranes that surround the brain. The bleeding is…
- Alarm clock headache A relatively rare form of headache in which the patient is awakened from sleep at the same time every night…
- Heebie-jeebies Extreme nervousness. A term coined by the America cartoonist Billy DeBeck (1890-1942) in his comic strip…
- Dystrophica myotonia 2 See: Myotonic dystrophy type 2
- Therapy, respiratory Exercises and treatments designed to help patients maintain and recover lung function, such as with cystic…
- Omphalo- A birth defect in which part of the intestine, covered only by a thin transparent membrane, protrudes outside…
- Heparin An anticoagulant (anti-clotting) medication. Heparin is useful in preventing thromboembolic complications…
- Pit, ear Tiny pit in front of the ear. Also preauricular pit. A minor anomaly of no great consequence in itself. More…
- Inguinal Having to do with the groin.
- Human T-lymphotropic virus type III An obsolete term for the human immunodeficiency virus, now commonly called HIV