MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Fourth cranial nerve
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- Equinophobia An abnormal and persistent fear of horses. Sufferers of equinophobia experience undue anxiety even when a…
- Preclinical study A study to test a drug, procedure or other medical treatment in animals. The aim is to collect data in…
- Cell, plasma A type of white blood cell that produces and secretes antibodies. A plasma cell is a fully differentiated…
- Marker A piece of DNA that lies on a chromosome so close to a gene that the marker and the gene are inherited…
- Nipple discharge See: Breast discharge
- Exercise cardiac stress testing The most widely used cardiac (heart) screening test. The patient exercises on a treadmill according to a…
- PCA Commonly used abbreviation for patient-controlled analgesia. Analgesia simply means relief of pain. PCA is a…
- Luteinizing hormone A hormone released by the pituitary gland in response to luteinizing hormone- releasing hormone. Abbreviated…
- Pityriasis alba A common mild rash of unknown origin that can appear on a person of any age (most commonly at 10-35 years of…
- Trichoepithelioma A small benign tumor derived from basal cells in the hair follicle. Trichoepithelioma may occur sporadically…
- FCC In medicine, familial colorectal cancer (not the Federal Communications Commission)
- Psychological child abuse Child abuse: Also known as emotional child abuse, this is the third most frequently reported form of child…