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).
Erythema chronicum migrans
The classic initial rash of Lyme disease. In the early phase of the illness, within hours to weeks of the tick bite, the local skin develops an expanding ring of unraised redness. There may be an outer ring of brighter redness and a…
Read the definitionRandom terms
Show more- Polio vaccine, killed See: Polio vaccine, inactivated
- Thermostat A device that monitors temperature and automatically maintains it at certain levels. In a human, a tiny part…
- IUGR 1. Originally, intrauterine growth retardation.2. More recently, intrauterine growth restriction.
- Flu vaccine, nasal-spray See: Nasal flu vaccine
- Rectal bleeding Rectal bleeding: Blood passed rectally. Blood in the stool can be bright red or maroon in color. Larger…
- Autoimmune Pertaining to autoimmunity, a misdirected immune response that occurs when the immune system goes awry and…
- Intensity modulated radiation therapy IMRT. A type of three-dimensional radiation therapy that uses computer-generated images to match radiation to…
- Glioma A brain tumor that begin in a glial, or supportive, cell, in the brain or spinal cord. Malignant gliomas are…
- Central At or near the center. In anatomy and medicine (as elsewhere), central is the opposite of 'peripheral' which…
- Shigellosis Epidemic and opportunistic bacillary dysentery due to infection with the Shigella bacteria. Shigellosis…
- Cystic periventricular leukomalacia Softening of the white matter near the ventricles of the brain resulting in abnormal cysts. Cystic…
- Disease, sixth A viral disease of infants and young children with sudden onset of high fever which lasts several days and…