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).
Point mutation
A single nucleotide base change in the DNA. A point mutation may consist of the loss of a nucleotide, the insertion of an additional nucleotide, or the substitution of one nucleotide for another. The first point mutation discovered in…
Read the definitionRandom terms
Show more- Arteriosclerosis Hardening and thickening of the walls of the arteries. Arteriosclerosis can occur because of fatty deposits…
- Lens The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines…
- Tympanic cavity The major portion of the middle ear, consisting of a narrow air-filled cavity in the temporal bone that…
- Zoophobia An abnormal and persistent fear of animals. A phobia is an unreasonable fear that can cause avoidance and…
- Arboviral encephalitis Inflammation of the brain (encephalitis) caused by infection with an arbovirus, a virus transmitted by a…
- Leech 1. An aquatic parasite that sucks blood from animals. Leeches play a role in medicine today. See: Leech…
- CT colonography Another name for virtual colonoscopy. The term CT colonography provides a more accurate description of the…
- Suicide, physician-assisted See: Physician-assisted suicide
- First cranial nerve The olfactory nerve, the nerve that permits the sense of smell. See: Olfactory nerve
- Congenital central hypoventilation syndrome Failure from birth of central nervous system control over breathing while asleep. There are usually no…
- Aneurysm, thoracic An aneurysm situated within the thorax (chest). See: Aneurysm, aortic. An aneurysm is a localized widening…
- Onychomycosis, proximal white subungual The rarest form of fungus infection of the finger or toenail. (Fungus infection of the finger or toenail is…