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).
Cranial nerve, fourth
The fourth cranial nerve, the trochlear nerve, is the nerve supply to the superior oblique muscle of the eye, one of the muscles that moves the eye. Paralysis of the trochlear nerve results in rotation of the eyeball upward and outward…
Read the definitionRandom terms
Show more- Cortisone An adrenocorticoid hormone, a naturally occurring hormone made by and secreted by the adrenal cortex, the…
- AQP Aquaporin
- Tapeworm, beef See Taenia saginata.
- Neuropathy, diabetic See: Diabetic neuropathy
- Transcription factor A protein that controls when genes are switched on or off -- whether genes are transcribed or not…
- Gait A manner of walking. Observation of the gait can provide clues to a number of diagnoses including Parkinson…
- Epiphysis The growth area near the end of a bone.
- Vaccination, Haemophilus influenzae type B (HIB) Immunization designed to prevent diseases caused by Haemophilus influenzae type B (HIB), a bacteria…
- Hydrocephalus ex-vacuo Hydrocephalus ex-vacuo: What is termed 'hydrocephalus ex-vacuo' occurs when there is damage to the brain…
- Metabolic Relating to metabolism, the whole range of biochemical processes that occur within us (or any living…
- Aspirin resistance 1. The inability of aspirin to protect a person from cardiovascular events such as heart attacks and strokes…
- Thermophobia An abnormal and persistent fear of heat, including hot weather and hot objects. Sufferers from thermophobia…