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).
Vasoconstriction
Narrowing of the blood vessels resulting from contracting of the muscular wall of the vessels. The opposite of vasodilation
Read the definitionRandom terms
Show more- Louse-borne typhus See: Typhus, epidemic
- Chromosome, acentric An abnormal chromosome (a microscopically visible carrier of the genetic material DNA) with two centromeres…
- Hematoma, intracerebral See: Intracerebral hematoma
- Fever, dengue An acute mosquito-borne viral illness of sudden onset that usually follows a benign course with headache…
- Thrombophilia The tendency to form blood clots (thrombosis). The clots can break off, travel through the bloodstream and…
- Nurses Health Study A very large and important prospective investigation into the risk factors for major chronic diseases in…
- Amebiasis Infection of the intestines with amebae, especially with the ameba Entamoeba histolytica, characterized by…
- Intercellular junction A specialized region of connection between two cells
- Cluster headache Headache: A distinctive syndrome of headaches, also known as migrainous neuralgia. There are two main…
- Dyslipidemia A disorder of lipoprotein metabolism, including lipoprotein overproduction or deficiency. Dyslipidemias may…
- Biochemical Relating to biochemistry, the application of the tools and concepts of chemistry to living systems…
- FALDH deficiency Also known as the Sjogren-Larsson syndrome, this is a genetic (inherited) disease usually characterized by a…