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).
Onycho- (prefix)
Pertaining to the nails. Examples of medical terms involving 'onycho-' include onychodystrophy (abnormal growth and development of the nails), onychomycosis (fungal infection of the nails), onychogryposis (abnormally curved nails) and…
Read the definitionRandom terms
Show more- Fever, typhus See: Typhus
- Scan, spiral CAT A conventional computerized axial tomography scan (CAT scan or CT scan) is an x-ray procedure which combines…
- Pericardium The conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The…
- Seizure Seizure: Uncontrolled electrical activity in the brain, which may produce a physical convulsion, minor…
- Lancing device A device that holds a lancet firmly, and when triggered, moves the lancet linearly ahead to prick the skin in…
- Fusiform aneurysm A vascular outpouching shaped like a spindle. A fusiform widening of an artery or vein. An aneurysm is a…
- Prenatal diagnosis Diagnosis before birth. Methods for prenatal diagnosis include ultrasound of the uterus, placenta, and/or…
- Breast development, early The beginning of breast development at puberty is known medically as thelarche. It is now a normal event at…
- Metacarpals Five cylindrical bones extending from the wrist to the fingers.
- Cystoscopy A procedure in which the doctor inserts a lighted instrument called a cystoscope into the urethra (the tube…
- Fear of blood An abnormal and persistent fear of blood. Sufferers of this very common phobia dread the sight of their own…
- Neurofibromatosis type 1 NF1, a genetic disorder characterized by a number of remarkable skin findings including multiple cafe au lait…