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).
Enzyme defect
A disorder resulting from a deficiency (or functional abnormality) of an enzyme. In 1902 Archibald Garrod first attributed a disease to an enzyme defect: an inborn error of metabolism. Today, newborns are routinely screened for certain…
Read the definitionRandom terms
Show more- IFA Indirect immunofluorescence assay
- Epizootic An epidemic outbreak of disease in an animal population, often with the implication that it may extend to…
- Cancer, uterus See: Uterine cancer
- Q.d. (on prescription) Seen on a prescription, q.d. (or qd) means one a day (from the Latin quaque die). The abbreviation is…
- Leukemia, hairy cell See: Hairy cell leukemia
- Hereditary progressive arthro-ophthalmopathy See: Stickler syndrome
- Cell, helper A type of T cell that participates in the immune response by recognizing foreign antigens and secreting…
- Response, plantar The plantar response, also known as the Babinski response, is an important neurologic examination based upon…
- Lung cancer, oat cell See: Oat cell cancer
- Hormone,T4 Thyroxine
- Pregnancy calendar A pregnancy calendar is a chronological depiction of changes in a pregnant woman and the embryo/fetus during…
- Amyotrophic lateral sclerosis 4 ALS4. A juvenile-onset form of amyotrophic lateral sclerosis (ALS) with no bulbar involvement, inherited in…