MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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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).
Nervous system, sympathetic
A part of the nervous system that accelerates the heart rate, constricts blood vessels, and raises blood pressure. The sympathetic nervous system together with the parasympathetic nervous system (that slows the heart rate, increases…
Read the definitionRandom terms
Show more- Biology, molecular See: Molecular biology
- Institute of Medicine One of the National Academies of the United States. The Institute of Medicine conducts policy studies on…
- Signal transduction pathway The course by which a signal from outside a cell is converted to a functional change within the cell
- Proctocele See: Rectocele
- Incest Sexual activity between individuals so closely related that marriage is prohibited. Incest involving a child…
- Marasmus Wasting away, as occurs with children who have kwashiorkor. Also called cachexia, is usually a result of…
- MS 1. Multiple sclerosis. See also entry to: Multiple sclerosis.2. Mass spectrometry
- RVF 1. Rift Valley fever, the disease and the virus that causes it.2. Right ventricular failure, failure of the…
- Vaccine, live polio See: Polio vaccine, oral
- Tarsal gland See: Meibomian gland
- Morbus gallicus The French disease. Syphilis. The name 'syphilis' was coined by Hieronymus Fracastorius (Girolamo…
- Deficiency, calcium See: Calcium deficiency