MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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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).
Fraction, ejection
The portion of blood that is pumped out of a filled ventricle as a result of a heartbeat. The heart does not eject all of the blood that is in the ventricle. Normally, about two-thirds of the blood is pumped out with each beat. That…
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Show more- Cataplexy A debilitating medical condition in which a person suddenly feels weak and collapses at moments of strong…
- Sexagenarian Someone in his or her sixties. See also: Age by decade
- Asthenia Weakness. Lack of energy and strength. Loss of strength. The word asthenia is not much used in medicine…
- Migraine, abdominal An attack of abdominal pain that may be preceded by a migraine aura and accompanied nausea, vomiting, and…
- State, acute confusional See: Delirium
- Aortic insufficiency Incomplete closure of the aortic valve resulting in aortic regurgitation, the return of blood from the aorta…
- Ectoparasitosis Infestation with an ectoparasite, a parasite that lives on or in the skin. The four major ectoparasitoses are…
- Pulse, collapsing See: Pulse, water hammer
- Otitis interna Inflammation of the inner ear. Sometimes used as a synonym for labyrinthitis, inflammation of the labyrinth…
- Ganglion Ganglion: The celebrated 2nd century Greek physician Galen ((c. 130-201 A.D.) who lived and worked in Rome…
- Red jungle fowl Gallus gallus, the ancestor of domestic chickens
- Psychogenic Caused by the mind or emotions.