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- Hemoglobin E Normal embryonic hemoglobin, the main type of hemoglobin found in the human embryo. The E stands for…
- Food Any substance eaten to provide nutritional support for the body
- Radiopaque Anything that does not let X-rays or other types of radiation penetrate. Radiopaque objects block radiation…
- Induration Induration: Localized hardening of soft tissue of the body. The area becomes firm, but not as hard as bone
- Engram An enduring change in the brain postulated to account for the persistence of memory. The term 'engram' was…
- Inhibin One of two hormones (designated inhibin-A and inhibin-B) secreted by the gonads (by Sertoli cells in the male…
- Diffuse mastocytosis A form of mastocytosis in which the entire skin is thickened and leathery with generalized reddening and…
- Barrett esophagus See: Barrett's esophagus
- Anaesthesia See: Anesthesia
- Polycythemia vera (PV) Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). PV…
- Simian virus 40 See: SV40
- Malleability, brain See Neuroplasticity