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).
Enzyme
A protein (or protein-based molecule) that speeds up a chemical reaction in a living organism. An enzyme acts as catalyst for specific chemical reactions, converting a specific set of reactants (called substrates) into specific products…
Read the definitionRandom terms
Show more- Parotids Salivary glands situated in front of the ears.
- Sign, Gottron A scaly, patchy redness over the knuckles seen in patients with dermatomyositis, an inflammatory muscle…
- Drug test An examination of biologic material (such as urine, hair, saliva, or sweat) to detect the presence of…
- F (symbol) A much used symbol, F stands for fractional concentration; free energy; Fahrenheit; visual field; fluorine…
- Palate, hard The bony part of the roof of the mouth. The hard palate is just in front of the soft palate
- Recurrent respiratory papillomatosis Recurrent respiratory papillomatosis involves the growth of numerous warty growths in the larynx on the vocal…
- Anthracycline A member of a family of chemotherapy drugs that are also antibiotics. The anthracyclines act to prevent cell…
- Conor and Bruch disease African tick typhus, one of the tick-borne rickettsial diseases of the eastern hemisphere similar to Rocky…
- Syndrome, prune belly Partial or complete absence of the abdominal muscles so that the outlines of the intestines are visible…
- Ketonuria A condition in which abnormally high amounts of ketone bodies (a byproduct of the breakdown of cells) are…
- Cardiac septum The septum of the heart is the dividing wall between the right and left sides of the heart. That portion of…
- Bronchus One of the large air tubes leading from the trachea to the lungs that convey air to and from the lungs. The…