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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Histiocytosis, malignant
Histiocytosis in which the histiocytes actually become cancerous. Treatment is by radiation and chemotherapy, and in some cases bone-marrow transplantation. See also histiocytosis.
Read the definitionRandom terms
Show more- Spitz-Holter valve A pioneering one-way valve created by John Holter to treat hydrocephalus. In 1955 Mr. Holter, , a hydraulics…
- Ear wax Ear wax: A natural wax-like substance secreted by special glands in the skin on the outer part of the ear…
- Fragile X syndrome Fragile X syndrome: One of the most common causes of inherited mental retardation and neuropsychiatric…
- Tablet splitting The practice of cutting tablets in half. The reason is usually financial. To reduce costs, a physician may…
- Granulation That part of the healing process in which rough, pink tissue containing new connective tissue and capillaries…
- Melorheostosis A rare bone condition that usually begins in childhood characterized by thickening of the bones (sclerosis)…
- Tumor marker, CEA Carcinoembryonic antigen (CEA) is a protein found in many types of cells but associated with tumors and the…
- Liver transplant Liver transplant: Surgery to remove a diseased liver and replace it with a healthy liver (or part of one)…
- RNA polymerase A polymerase is an enzyme that catalyzes the joining of many smaller molecules (called monomers) to form a…
- Birt Hogg Dube syndrome See: Birt-Hogg-Dube syndrome
- Primary amenorrhea Absence of menstruation. Amenorrhea is conventionally divided into primary and secondary amenorrhea. With…
- Aid, vibrotactile See: Vibrotactile aid