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.
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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).
Node, sinoatrial
The sinoatrial is one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses and conducts them throughout the muscle of the heart…
Read the definitionRandom terms
Show more- Metastasize The spread from one part of the body to another. When cancer cells metastasize and cause secondary tumors…
- Contact dermatitis, allergic Also called allergic contact eczema, this is a red, itchy, weepy reaction where the skin has come into…
- Genu The Latin word for the knee. When the knee is referred to in medicine, it is just called the knee. However…
- Mimesis Imitation or mimicry. Mimesis in medicine refers to the hysterical simulation of organic disease and to the…
- Bannayan syndrome A genetic disease characterized by macrocephaly (enlarged head), multiple lipomas (benign fatty tumors) and…
- Sirolimus A naturally occurring substance discovered in a soil sample from Easter Island. Sirolimus was initially…
- Fornix conjunctivae The fornix of the conjunctivae refers to loose arching folds connecting the conjunctival membrane lining the…
- Sign, Lhermitte Sudden transient electric-like shocks extending down the spine triggered by flexing the head forward. Due to…
- BAC Abbreviation for bacterial artificial chromosome. An artificially created chromosome in which medium-sized…
- Collagen IV alpha 5 See: COL4A5
- Abductor spasmodic dysphonia A disorder in which sudden muscle spasms cause the vocal folds (or vocal cords) to stay open. See: spasmodic…
- Mark of Cain The mark that God set upon Cain, the eldest son of Adam. According to the Book of Genesis in the Bible, God…