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.
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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).
Narcolepsy
Narcolepsy: A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Narcolepsy is often associated with cataplexy (a sudden loss of muscle tone and paralysis of voluntary muscles associated with a strong…
Read the definitionRandom terms
Show more- Mendelism The principles of genetics, specifically of single-gene traits, based on the work of Gregor Mendel (1822-84)…
- Scan, helical CAT A conventional computerized axial tomography scan (CAT scan or CT scan) is an x-ray procedure which combines…
- End-of-life companion See: Doula (the second meaning)
- ASL American Sign Language
- Ocular Having to do with the eye. In a microscope, the lens closest to the eye is termed the ocular (the eyepiece)…
- Arthritis Arthritis: Inflammation of a joint. When joints are inflamed they can develop stiffness, warmth, swelling…
- Foramen A natural opening. Although a foramen is usually through bone, it can be an opening through other types of…
- Foodborne disease A disease caused by consuming contaminated food or drink. Myriad microbes and toxic substances can…
- Defibrillation The use of a carefully controlled electric shock, administered either through a device on the exterior of the…
- Laryngeal dystonia See: Spasmodic dysphonia
- Women's Health Initiative A hospital for the exclusive use of women. The first hospital called by that name was the Woman's Hospital of…
- Juncture In anatomy, a place where two or more structures join; a joint. From the Latin jungere, to join