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).
Sinus rhythm
The normal regular rhythm of the heart set by the natural pacemaker of the heart called the sinoatrial (or sinus) node. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start…
Read the definitionRandom terms
Show more- Vessel, afferent A vessel that carries blood toward the heart. A vein or venule
- In situ hybridization, fluorescent An important molecular cytogenetic method for identifying chromosomes and parts of chromosomes, deciphering…
- Fibrates for lowering cholesterol Fibrates are cholesterol-lowering drugs that are primarily effective in lowering triglycerides and, to a…
- Cathexis In psychiatry, the concentration of psychic energy on an idea, object, or other object
- Pickwickian syndrome The combination of obesity, somnolence (sleepiness), hypoventilation (underbreathing), and plethoric (red)…
- S1-S5 (sacral vertebrae) The first sacral vertebra through the fifth sacral vertebra. There are 5 sacral vertebral bones. They are…
- Urine infection in children See: Urinary tract infection in children
- Shigella Epidemic and opportunistic bacillary dysentery due to infection with the Shigella bacteria. Shigellosis…
- CoQ10 See: Coenzyme Q10
- Artificial insemination by husband (AIH) A procedure in which a fine catheter (tube) is inserted through the cervix (the natural opening of the…
- Hydrogen The most plentiful element in the universe and one present in all organic compounds. Hydrogen is a gas with…
- Shoulder pain Pain in the shoulder due to an injury or disease. The design of the shoulder joint is such that it sacrifices…