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).
Atrioventricular node
The atrioventricular (AV) node is an electrical relay station between the atria (the upper) and the ventricles (the lower chambers of the heart). Electrical signals from the atria must pass through the AV node to reach the ventricles. The…
Read the definitionRandom terms
Show more- Vasa previa A condition in which blood vessels within the placenta or the umbilical cord are trapped between the fetus…
- Blocker, beta adrenergic A class of drugs, also more simply called beta blockers, that block beta-adrenergic substances such as…
- Polygenic disease A genetic disease caused by the combined actions of two or more genes. Examples of polygenic diseases include…
- Restriction map An array of sites in DNA susceptible to cleavage by diverse restriction enzymes
- Seborrheic dermatitis A medical name for what is popularly called seborrhea
- Aneurysm, racemose An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an…
- Alkyl group In chemistry, a group of atoms derived from an alkane (a hydrocarbon with no carbon-to-carbon multiple bonds)…
- Opiate A medication or illegal drug that is either derived from the opium poppy, or that mimics the effect of an…
- AP, X-ray An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA…
- Chemotherapy L ODYvAlign=top bgColor=#cccccc colSpan=2> vAlign=top width='100%' bgColor=#ffffff>Our Chemotherapy Main…
- Alpha-defensin See: Defensin
- Laryngeal palsy Paralysis of the recurrent laryngeal nerve, a branch of the vagus nerve (a long and important nerve that…