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).
Primary amenorrhea
Absence of menstruation. Amenorrhea is conventionally divided into primary and secondary amenorrhea. With primary amenorrhea, menstruation never takes place. It fails to occur at puberty. With secondary amenorrhea, menstruation starts but…
Read the definitionRandom terms
Show more- Hip, developmental dislocation of the (DDH) The abnormal formation of the hip joint in which the ball at the top of the thighbone (the femoral head) is…
- Schistosoma haematobium A species of trematode worm that parasitizes humans and causes urinary tract disease. See Schistosomiasis
- Syndrome, Shulman's (Eosinophilic fasciitis) A disease which leads to inflammation and thickening of the skin and fascia. (The fascia is a lining tissue…
- Hughes Investigator See: Howard Hughes Medical Institute
- Palpebral conjunctiva The part of the conjunctiva, a clear membrane, that coats the inside of the eyelids. The palpebral…
- Ischemia Inadequate blood supply (circulation) to a local area due to blockage of the blood vessels to the area.
- Thai hemorrhagic fever A syndrome due to the dengue virus that tends to affect children under 10, causing abdominal pain, hemorrhage…
- Positive-strand RNA virus Also known as a sense-strand RNA virus, a virus whose genetic information consists of a single strand of RNA…
- Acute-phase reactant See: Acute-phase protein
- Canine heartworm Dirofilaria immitis. See: Heartworm
- Paget disease of the breast The combination of scaly skin changes of the nipple resembling eczema and an underlying cancer of the breast…
- Congenital defect A birth defect.