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.
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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).
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…
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Show more- Peptic ulcer Peptic ulcer: A hole in the lining of the stomach, duodenum, or esophagus. A peptic ulcer of the stomach is…
- Neurocysticercosis Infection of the brain by the larval form of the pork tapeworm Taenia solium. Neurocysticercosis is a form of…
- Cold sore A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and…
- Test, eye chart This test measures how well you see at various distances. The eye chart itself -- the usual one is called…
- Elbow, cellulitis of the Inflammation of the skin around the elbow due to infection (cellulitis) commonly occurs as a result of…
- Thyroxine Abbreviated T4. A hormone made by the thyroid gland that has four iodine molecules attached to its molecular…
- Hump, dowager An outward curvature of the vertebrae of neck, creating a hump at the back of the neck, once thought to be a…
- Acute coronary syndromes A spectrum of conditions involving chest discomfort or other symptoms caused by lack of oxygen to the heart…
- Facial canal introitus In anatomy, an introitus is an entrance, one that goes into a canal or hollow organ. The introitus of the…
- Felty's syndrome Felty's syndrome: A complication of long-standing rheumatoid arthritis. See: Felty syndrome.
- Cranial nerve, first The cranial nerves emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge…
- Deficiency, glucocerebrosidase Causes type 1 Gaucher disease, a progressive genetic disease due to an enzyme defect. The enzyme…