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).
Nerve, fourth cranial
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- Vesicoenteric Pertaining to both the urinary bladder and intestine or to a communication between them, as in a…
- Nurse 1) A person trained, licensed, or skilled in nursing. 2) To feed an infant at the breast
- Aortic insufficiency Incomplete closure of the aortic valve resulting in aortic regurgitation, the return of blood from the aorta…
- Sleep Sleep: The body's rest cycle. Sleep is triggered by a complex group of hormones that are active in the main…
- Gynecologist A doctor who specializes in treating diseases of the female reproductive organs. The word 'gynecologist'…
- Debilitate To impair the strength or to enfeeble. A chronic progressive disease may debilitate a patient. So may…
- Angina, variant Angina, variant: Chest pain due to coronary artery spasm, a sudden constriction of a coronary artery (one of…
- Vocal cord paralysis Vocal cord paralysis:bility of one or both vocal folds (vocal cords) to move. The paralysis is usually due to…
- Chromosome, acrocentric An abnormal chromosome that is distinctive in appearance but not fully identified. A marker chromosome is not…
- Tachycardia, paroxysmal atrial A fast heartbeat (tachycardia) because of rapid firing of the sinoatrial (sinus) node. The sinoatrial (or…
- Roseola infantilis Roseola infantilis: Roseola infantilis is another name for roseola, also formally called roseola infantum…
- Pancreatitis, acute See: Acute pancreatitis