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).
Random mating
Totally haphazard mating with no regard to the genetic makeup (genotype) of the mate so that any sperm has an equal chance of fertilizing any egg. This rarely, if ever, occurs but the concept is important in population genetics. Also…
Read the definitionRandom terms
Show more- Vomer A triangular bone in the nasal septum. The bone was so named because it was thought to look like a…
- Hirschsprung disease Hirschsprung disease: A congenital abnormality (birth defect) of the bowel in which there is absence of the…
- Os sacrum The large, heavy bone at the base of the spine, which is made up of fused sacral vertebrae. The sacrum is…
- Lactose intolerance Lactose intolerance: Inability to digest lactose, a component of milk and most other dairy products. Lactose…
- ASD Acronym for atrial septal defect.
- Zinc excess Too much zinc can cause gastrointestinal irritation (upset stomach), interfere with copper absorption and…
- Fibroadenoma A benign growth in the breast that is solid, firm, smooth and usually painless or only slightly tender…
- LaCrosse encephalitis Enzyme that breaks down the milk sugar lactose into glucose and galactose. Persons with a deficiency of…
- Morphea Skin changes that are localized to one or more patchy areas of skin that become hardened, dry, smooth and…
- Nit Nits are lice eggs. They are hard to see and are often confused with dandruff or hair spray droplets. Nits…
- Vitreous A clear, jelly-like substance that fills the middle of the eye. Also called the vitreous humor, 'humor' in…
- Midget A very small person (or thing). Midget is a picturesque but somewhat disparaging term. It is the diminutive…