MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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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).
Lichen planus
Lichen planus: A common skin disease with small itchy pink or purple spots on the arms or legs. The lesions (abnormal areas) on the skin in lichen planus are typically polygonal, flat (hence, the term planus), and pruritic (itchy). Occurs…
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Show more- Syndrome, Gareis-Mason See Syndrome, MASA
- Piriformis syndrome Irritation of the sciatic nerve caused by compression of the nerve within the buttock by the piriformis…
- Tick typhus Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the…
- Transfer RNA (tRNA) A class of RNA that has triplet nucleotide sequence complementary to the triplet nucleotide coding sequences…
- Vitamin B3 Vitamin B3 is niacin. Deficiency of niacin causes pellagra. Pellagra was known as the 'disease of the four…
- Colpopexy The use of surgical-quality stitches to bring a displaced vagina back into position against the abdominal wall
- Centimeter (cm) A unit of measure in the metric system which is 1/100'th of a meter. There are 2.54 centimeters (cms) in one…
- Spinal stenosis Narrowing of the spaces in the spine, resulting in compression of the nerve roots or spinal cord by bony…
- Ciliary muscle One of the muscles that relax the zonules to enable the lens to change shape for focusing. The zonules are…
- Microtubule motor See: Microtubule motor protein
- Muscular dystrophy, facioscapulohumeral A form of muscular dystrophy that begins before age 20 with slowly progressive weakness of the muscles of the…
- Gene, transporter A gene that allows drugs to enter cells or, in some cases, acts to keep them out. Transporter genes may…