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).
Aorta, thoracic
The thoracic aorta is a section of the aorta, the largest artery in the body, within the chest. Specifically, the thoracic aorta is that part of the aorta that starts after the arch of the aorta and runs down to the diaphragm, the great…
Read the definitionRandom terms
Show more- Castration Removal of the sex glands, usually used to indicate removal of the male testicles
- DNR Do not resuscitate. See also Advance medical directives
- Heart, right The heart is composed functionally of two hearts - the right heart and the left heart. The right heart…
- Macula A macula is a small spot. A macula on the skin is a small flat spot while the macula in the eye is a small…
- Syndrome, Kanner (Also called autism). A spectrum of neuropsychiatric disorders characterized by deficits in social…
- PID (pelvic inflammatory disease) Despite its seeming lack of gender, this term is applied to women only. PID refers exclusively to ascending…
- Xeroderma pigmentosum A genetic disease characterized by such extraordinary sensitivity to sunlight that it results in the…
- Ketonuria A condition in which abnormally high amounts of ketone bodies (a byproduct of the breakdown of cells) are…
- Tendonopathy Any disease or dysfunction of a tendon, The form of tendonopathy is named for the affected tendon, as in…
- Hydroxyapatite Hydroxyapatite: A major component and an essential ingredient of normal bone and teeth. Hydroxyapatite makes…
- Allodynia Pain from stimuli which are not normally painful. The pain may occur other than in the area stimulated…
- Q.h. (on prescription) Abbreviation for 'every hour.' On a prescription or doctor's hospital orders, q.h. means every hour. Also…