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).
Litmus
A pigment used as a test for acidity and alkalinity. Litmus paper turns red in acid and blue in an alkaline solution. Litmus is prepared from lichens like Roccella tinctoria. Figuratively, a litmus test is a decision in which a single…
Read the definitionRandom terms
Show more- Myelin The fatty substance that covers and protects nerves. Myelin is a layered tissue that sheathes the axons…
- ASCUS An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System…
- Hereditary kidney cancer Kidney cancer due to a gene than can be transmitted from parent to child. The vast majority of kidney cancer…
- Acapnia Less than the normal level of carbon dioxide in the blood. The opposite of hypercapnia. The origin of the…
- Selective tubal occlusion procedure (The acronym for selective tubal occlusion procedure is STOP.) A nonsurgical form of permanent birth control…
- Reiter syndrome A chronic form of inflammatory arthritis wherein the following three conditions are combined: (1) arthritis…
- Scratch test for allergy A mammogram (an X-ray of the breast) in women who have no signs of breast cancer. It usually involves two…
- Chronic disease A disease that persists for a long time. A chronic disease is one lasting 3 months or more, by the definition…
- Fascinoma Medical slang for a fascinating case, usually involving a rare disease
- Bones of the trunk The bones of the human trunk, 51 bones in all, consisting of 26 vertebrae, 24 ribs and the sternum. The 26…
- Bummed out Slang term for depression. For more, see: Depression
- Megabase Unit of length for DNA fragments that is equal to 1 million nucleotides. A megabase (Mb) is roughly equal to…