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).
Syncope, defecation
The temporary loss of consciousness upon defecating (having a bowel movement). Syncope is the temporary loss of consciousness or, in plain English, fainting. The situations that trigger this reaction are diverse and include having blood…
Read the definitionRandom terms
Show more- Morning-after pill A form of contraception used after rather than before sexual intercourse. Morning-after pills interfere with…
- Orchitis Inflammation of the testis (male sex organ). There are many causes of inflammation of the testis including…
- Bone density Bone density is the amount of bone tissue in a certain volume of bone. It can be measured using a special…
- APO-1 See: FAS gene
- Immunocompetence The ability to produce a normal immune response
- Ewing sarcoma Sarcoma: A type of bone tumor that occurs in children and adolescents, most often in the large bones of the…
- Vitamin B -- niacin Deficiency of niacin, one of the B-complex vitamins, causes pellagra. See: Pellagra
- Winter depression See: Tooth, wisdom.
- Excrescence An oral antiestrogen. Exemestane inhibits the enzyme aromatase in the adrenal glands that produces the…
- Diffuse mastocytosis A form of mastocytosis in which the entire skin is thickened and leathery with generalized reddening and…
- Vulva cancer See: Cancer of the vulva
- Map, cytogenetic A genetic term referring to the visual appearance of a chromosome when stained and examined under a…