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).
Down syndrome features
Children with Down syndrome have multiple malformations and mental impairment due to the presence of extra material from chromosome 21. Among the more common physical features are hypotonia (floppiness), small head with brachycephaly…
Read the definitionRandom terms
Show more- Osteogenesis imperfecta tarda See: Osteogenesis imperfecta type I.
- Antibiotic resistance Antibiotic resistance: The ability of bacteria and other microorganisms to withstand an antibiotic to which…
- IBD (inflammatory bowel disease) A group of chronic intestinal diseases characterized by inflammation of the bowel -- the large or small…
- Thorax The area of the body located between the neck and the abdomen that contains the lungs, the heart and part of…
- Trichinella spiralis The worm that causes trichinosis. Trichinella spiralis larvae can infest pigs and wild game, hibernating in…
- Hormone, cortisol The primary stress hormone. Cortisol is the major natural glucocorticoid in humans
- Hurler syndrome An inherited error of metabolism in which there is deficiency of the enzyme alpha-L-iduronidase which…
- Polymerase, RNA Enzyme that catalyzes (speeds) the polymerization of RNA. RNA polymerase uses preexisting nucleic acid…
- Catheter A thin, flexible tube. For example, a catheter placed in a vein provides a pathway for giving drugs…
- Marker chromosome An abnormal chromosome that is distinctive in appearance but not fully identified. A marker chromosome is not…
- Fracture, open A fracture in which the bone is sticking through the skin. Also called a compound fracture. NTER> A fracture…
- Osteochondroma An abnormal, solitary, benign growth of bone and cartilage, typically at the end of a long bone…