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).
Pacemaker, natural
Pacemaker, natural: The natural pacemaker of the heart is the sinus node, one of the major elements in the cardiac conduction system, the system that controls the heart rate. This stunningly designed system generates electrical impulses…
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Show more- Purpura 1. A hemorrhagic area in the skin. The area of bleeding within the skin, by definition, is greater than 3…
- Chromosome, metaphase See: Y chromosome
- Centenarian Someone who is 100 or more years old. Someone 110 years old and over (no upper limit) may also be referred to…
- Ascending pathway A nerve pathway that goes upward from the spinal cord toward the brain carrying sensory information from the…
- Disc, slipped Rupturing of the tissue that separates the vertebral bones of the spinal column. The center of the disc…
- Absenteeism The frequent absence from work or other duty without good reason. See also: Presenteeism
- Q bands A form of chromosome band, one of the bright and dull fluorescent bands seen alternating along the length of…
- Aneurysm, cardiac Outpouching of an abnormally thin portion of the heart wall. An aneurysm is a localized widening (dilatation)…
- Dia- Prefix taken straight from the Greek meaning 'through, throughout, completely' as in diachronic, diagnosis…
- Insufficiency, coronary See: Coronary insufficiency
- Hepatitis Inflammation of the liver caused by the hepatitis A virus (HAV). HAV is usually transmitted from person to…
- Fever with renal syndrome, hemorrhagic A set of diseases, also known as hemorrhagic fever, characterized by the abrupt onset of high fever and…