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- Biliousness A term used in the 18th and 19th centuries pertaining to bad digestion, stomach pains, constipation, and…
- Septal defect, ventricular (VSD) A hole in the septum (the wall) between the lower chambers of the heart (the ventricles). Ventricular Septal…
- Ear, internal There are three sections of the ear. They are the external ear, the middle ear, and the internal ear. The…
- Law, Hardy-Weinberg Basic concept in population genetics discovered independently in 1908 by the great English mathematician…
- Cross-species transplantation See Xenotransplantation
- Shprintzen syndrome See: Velocardiofacial syndrome
- Dysmorphic feature A body characteristic that is abnormally formed. A malformed ear, for example, is a dysmorphic feature…
- Hormone, aldosterone A hormone made by the outer portion (cortex) of the adrenal gland that regulates the balance of salt and…
- Louise Brown See: Brown, Louise.
- Hypovolemia An abnormal decrease in blood volume or, strictly speaking, an abnormal decrease in the volume of blood…
- AC Abbreviation for a.c. (ante cibum on a prescription); acromioclavicular (shoulder joint); antecubital (crook…
- Tremor Tremor: Any abnormal repetitive shaking movement of the body. Tremors have many causes and can be inherited…