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).
CAT scan, spiral
A conventional computerized axial tomography scan (CAT scan or CT scan) is an x-ray procedure which combines many x-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the…
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Show more- Endocrine Pertaining to hormones and the glands that make and secrete them into the bloodstream through which they…
- Extracranial Outside the cranium, the bony dome that houses and protects the brain. As opposed to intracranial, inside the…
- Separation anxiety disorder Excessive anxiety concerning separation from home or from those to whom a child is attached. The child may…
- Ammonia A colorless gas with a very sharp odor. Made both by humans and by nature, ammonia dissolves easily in water…
- Goldenhar syndrome Congenital malformation of the jaw, cheek and ear associated with vertebral defects. There is deformity of…
- Phantom vision Seeing images after total loss of eyesight
- Reservoir of infection Any person, animal, plant, soil or substance in which an infectious agent normally lives and multiplies. The…
- Toe sign An important neurologic examination based upon what the toes do when the sole of the foot is stimulated. If…
- Locomotive system Limited to a local region. See also: Locoregional anesthesia; Locoregional metastasis.
- Vater, ampulla of See: Ampulla of Vater
- Methanococcus jannaschii A microbe that produces methane, an important energy source, and contains enzymes that withstand high…
- Air bag A bag that fills with air, designed for frontal impact crashes, the kind of crashes which account for more…