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).
Histiocytosis, sinus
A variant of histiocytosis in which the lymph nodes are the main site of histiocyte proliferation. The sinuses become filled with and distended by masses of histiocytes. See also histiocytosis.
Read the definitionRandom terms
Show more- Womb cancer See: Uterine cancer
- Tomo- Or tom- before a vowel. A combining form meaning a cut, section, or layer, as might be achieved by cutting or…
- Tube, nasogastric See: Nasogastric tube
- Sequence tagged site (STS) A short (200 to 500 base pair) DNA sequence that occurs but once in the genome and whose location and base…
- CDHR Center for Devices & Radiological Health, part of the FDA (the US Food & Drug Administration)
- Respiratory disease, acute A sudden condition in which breathing is difficult and the oxygen levels in the blood abruptly drop lower…
- Enteral nutrition Pertaining to the small intestine. Also called (less often) enteral.
- Smallpox vaccination adverse reaction An adverse event occurring after smallpox vaccination (vaccinia). Smallpox vaccination is a relatively safe…
- Autistic savant A person with autism who is exceptionally gifted in a specialized field. That field may, for example, be…
- Hornet sting Stings from hornets and other large stinging insects such as bees, yellow jackets and wasps can trigger…
- White coat hypertension A transient increase in blood pressure (hypertension) triggered by the sight of medical personnel in white…
- Syndrome, scalded skin See Scalded skin syndrome