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).
Arcus senilis
A cloudy opaque arc or circle around the edge of the eye, often seen in the eye of the elderly.
Read the definitionRandom terms
Show more- Microcephaly Microcephaly: An abnormally small head due to failure of brain growth. In precise terms, microcephaly is a…
- Ear, slanted An ear that is slanted more than usual. Technically, an ear is slanted when the angle of the slope of the…
- Reagent A substance used to produce a chemical reaction to detect, measure, produce, etc. other substances
- Segawa dystonia Dystonia: An important variant form of dopa-responsive dystonia (DRD). DRD typically begins in childhood or…
- Glucuronosyltransferase, UDP- A liver enzyme essential to the disposal of bilirubin (the chemical that results from the normal breakdown of…
- Microorchidism Abnormally small testes. To determine if the testes are too small, a device called an orchidometer is used…
- Biotin A water-soluble B-complex vitamin involved in carbon dioxide transfer and therefore essential to the…
- Mark of Cain The mark that God set upon Cain, the eldest son of Adam. According to the Book of Genesis in the Bible, God…
- Histoplasma capsulatum See: Histoplasma
- Calorie A unit of food energy. In nutrition terms, the word calorie is used instead of the more precise scientific…
- Vestibular system A system in the body that is responsible for maintaining balance, posture, and the body's orientation in…
- Tension, intravenous The pressure of the blood within a vein, the venous pressure