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.
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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).
Syndrome, Stevens-Johnson
A genetic disorder also known as hyperexplexia in which babies have an exaggerated startle reflex (reaction). This disorder was not recognized until 1962 when it was described by Drs. Kok and Bruyn as a disease with the onset at birth of…
Read the definitionRandom terms
Show more- Hypo- Prefix meaning 'low, under, beneath, down, below normal' as in hypocalcemia (low calcium in the blood)…
- Acute otitis media Otitis media: Inflammation of the middle ear in which there is fluid in the middle ear accompanied by signs…
- Morton's syndrome A syndrome characterized by a shortened first metatarsal (foot) bone that results in excessive force on the…
- Reflex A reaction that is involuntary. The corneal reflex is the blink that occurs with irritation of the eye. The…
- Polyclonal Derived from different cells. As opposed to monoclonal
- Cataract, nuclear A cataract that occurs in the center (the nucleus) of the lens. See: Cataract
- Acquired Anything that is not present at birth but develops some time later. In medicine, the word 'acquired' implies…
- Geiger counter The most commonly used portable radiation detection and measuring instrument, consisting of a gas-filled tube…
- OPCA Olivopontocerebellar atrophy
- Levothyroxine See: Thomas, Lewis.
- Tarsal gland See: Meibomian gland
- Node, sinus The sinus node is one of the major elements in the cardiac conduction system, the system that controls the…