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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Expressivity
The consistency of a genetic disease. For example, Marfan disease shows variable expressivity. Some persons with Marfan's merely have long fingers and toes while others have the full-blown disease with dislocation of the lens and…
Read the definitionRandom terms
Show more- Ectromelia virus A member of the poxvirus family which is a highly virulent natural pathogen of mice that causes mousepox, a…
- Chlorobenzylidenemalononitrile A riot control agent or 'tear gas.' See: Riot control agent poisoning
- Fever, tick See: Rocky Mountain spotted fever
- Medical research resource, ATCC as E Culture Collection as: Although little known to the general public, the American Type Culture Collection…
- Q fever vaccine A vaccine against Q fever, an illness first recognized in Australia in the 1930's that affects people dealing…
- Trench mouth A progressive painful infection of the mouth and throat with ulceration, swelling and sloughing off of dead…
- Myocardial infarction A heart attack. Abbreviated MI. The term 'myocardial infarction' focuses on the myocardium (the heart muscle)…
- Chorionic villus sampling Chorionic villus sampling: A procedure for first-trimester prenatal diagnosis. Chorionic villus sampling may…
- Hogwarts headache Headache: A generalized headache from spending many hours reading an unusually long volume such as one of…
- Nipple absence Medically called athelia, this is a rare condition but it is common in certain conditions. Athelia tends to…
- Infiltrating ductal carcinoma of the breast Breast: Infiltrating ductal carcinoma is one of several recognized specific patterns of cancer of the breast…
- Ragged red fibers with CPEO See: Kearns-Sayre syndrome