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).
Lactose intolerance
Lactose intolerance: Inability to digest lactose, a component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so those with a lactase deficiency should check labels carefully. The…
Read the definitionRandom terms
Show more- QNS On a lab report, Quantity Not Sufficient. The sample is not large enough to do the test
- Bio- Prefix indicating living plants or creatures, as in biology, the study of living organisms
- Journal, medical, first American The first U.S. medical journal, the Medical Repository was founded in 1797 and published quarterly until…
- Pott's disease An old term for tuberculosis of the spine that caused softening and collapse of the vertebrae, often…
- Aphthous ulcer Aphthous ulcer: A small sensitive painful ulcer crater in the lining of the mouth. Commonly called a canker…
- Beers criteria Criteria for safe medication use in older adults -- for people over 65 years of age. First issued in 1991…
- Pectus carinatum Pigeon-breasted. In Latin 'pectus' means 'chest' and 'carina' keel = a chest shaped like the keel of a boat…
- Toko- (prefix) Stemming from the Greek word 'tokos' meaning childbirth, we have toc-, toco-, tok-, and toko- as combining…
- Ductus arteriosus A key arterial shunt (ductus) in fetal life. Before birth, blood pumped from the heart through the pulmonary…
- Disruption sequence The events that occur when a fetus that is developing normally is subjected to a destructive agent such as…
- Cholecystokinin Abbreviated CCK. A polypeptide hormone that stimulates the contraction of the gallbladder with release of…
- Dystocia, cervical See: Cervical dystocia