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).
Acapnia
Less than the normal level of carbon dioxide in the blood. The opposite of hypercapnia. The origin of the word 'acapnia' is curious. It comes from the Greek 'a-' meaning 'without' + 'kapnos' meaning 'smoke' so acapnia literally means…
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Show more- Exercise, aerobic Brisk physical activity requiring the heart and lungs to work harder to meet the body's increased oxygen…
- Sitosterolemia A genetic disease involving lipids (fats) in which there is excessive intestinal absorption of dietary…
- Triptans (Triptan) Fear of the number 13. Written reference to this fear dates to the late 1800s. The term triskaidekaphobia…
- Yard In length, 3 feet or 36 inches or, metrically, 91.44 centimeters. The yard, along with the foot and inch, are…
- Alkaloid A member of a large group of chemicals that are made by plants and have nitrogen in them. Many alkaloids…
- Taste Taste belongs to our chemical sensing system, or the chemosenses. The complicated process of tasting begins…
- Tophus A nodular mass of uric acid crystals. Tophi are characteristically deposited in different soft tissue areas…
- Blood-brain barrier A protective network of blood vessels and cells that filters blood flowing to the brain.
- Spondylolysis The breaking down (dissolution) of a portion of a bony building block of the spine (a vertebra). The portion…
- Anatomy, microscopic Known among medical students simply as 'micro', microscopic anatomy is the study of the form of normal…
- Disease, Meniere A condition with recurrent vertigo accompanied by ringing in the ears (tinnitus) and deafness. Symptoms…
- Hg Symbol for the metallic element mercury. The abbreviation 'mm Hg' means millimeters of mercury, the height of…