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).
Valve, tricuspid
One of the four heart valves, the tricuspid valve is the first one that blood encounters as it enters the heart. The tricuspid valve is situated between the right atrium and right ventricle and allows blood to flow only from the atrium…
Read the definitionRandom terms
Show more- Synaptic cleft The tiny space between two nerve cells across which the neurotransmitter acetylcholine diffuses
- Antrum A general term for cavity or chamber which may have specific meaning in reference certain organs or sites in…
- Reflex, let down The let down reflex of the mother is an involuntary reflex during breastfeeding which causes the milk to flow…
- Papilloma A small solid benign tumor with a clear-cut border that projects above the surrounding tissue
- Vein, superior vena cava A large vein that receives blood from the head, neck, upper extremities, and thorax and empties it into the…
- Carbohydrates Mainly sugars and starches, together constituting one of the three principal types of nutrients used as…
- Nurses Health Study A very large and important prospective investigation into the risk factors for major chronic diseases in…
- Psychopathic personality Ee: Antisocial personality disorder
- Melanoma, conjunctival An uncommon eye cancer that arises in the conjunctiva, the clear membrane that covers the outer surface of…
- BLAST Abbreviation for Basic Local Alignment Search Tool, a computer program that identifies homologous genes in…
- Medical prefix A prefix employed in medical terminology. Medical words are often put together, cobbled from two or more…
- Mitochondrial disease Mitochondrial disease: Mutations (changes) in the mitochondrial chromosome are responsible for a number of…