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).
Orthologous gene
1. A term coined by the chemist Linus Pauling who defined it as "the preservation of good health and the treatment of disease by varying the concentration in the human body of substances that are normally present in the body. The treatment…
Read the definitionRandom terms
Show more- Precancerous Pertaining to something that is not yet overtly cancerous, but appears to be on its way to becoming a cancer…
- Test, Fisher's exact A statistical test of independence much used in medical research. It tests the independence of rows and…
- Chromatids The daughter strands of a duplicated chromosome joined together by a centromere.
- Abruptio (abruptio placentae) Premature separation of the placenta from the wall of the uterus. Abruption is a potentially serious problem…
- Family history The family structure and relationships within the family, including information about diseases in family…
- Catalyst A substance that speeds up a chemical reaction but is not consumed or altered in the process. Catalysts are…
- Anaerobic Not requiring oxygen. Anaerobic bacteria do not need oxygen to grow; in fact, oxygen is usually toxic to…
- Polio, abortive A minor form of infection with the polio virus, abortive polio accounts for 80 to 90 percent of clinically…
- Uterine bleeding See: Menstruation. See also Menometrorrhagia; Menorrhagia; Metrorrhagia
- Patau syndrome (trisomy 13 syndrome) A syndrome characterized by multiple malformations, commonly including scalp defects, hemangiomas (blood…
- Typhoid See: Typhoid fever
- Dilate To stretch or enlarge. It comes from the Latin verb 'dilatare' meaning 'to enlarge or expand.