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).
Cataract, primary
A cataract that develops independently of other diseases. A primary cataract is in contrast to a secondary cataract, one that is secondary to another disease
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Show more- Depression, major Depression, major: A disease that interferes with the ability to work, sleep, eat, and enjoy once pleasurable…
- Spina bifida occulta A bony defect in the vertebral column that causes a cleft in that column. The cleft remains covered by skin…
- Megalencephaly Also called macrencephaly, a condition in which there is an abnormally large, heavy, and usually…
- Hypodontia and nail dysgenesis A genetic disorder characterized by the absence of several teeth (hypodontia) and abnormalities of the nails…
- Ear, external There are three sections of the ear. They are the external ear, the middle ear, and the inner ear. The…
- Ophthalmopathy Any eye disease. External ophthalmopathy may refer to any disease of the eyelid, cornea, conjunctiva, or eye…
- Hepatomegaly An enlarged liver. 'Hepato-' comes from the Greek 'hepatikos' (of the liver) + 'megaly' from the Greek…
- ACE2 (angiotensin converting enzyme 2) An essential regulator of heart function. Also may be involved in the embryonic development of the heart. The…
- Menstrual Pertaining to menstruation (the menses), as in last menstrual period, menstrual cramps, menstrual cycle, and…
- Cranio- Insufficient intake of nitrogen-containing food (protein) to maintain a nitrogen balance or nitrogen…
- Occupational disease A disease due to a factor in a person's occupation. For example, lung disease in miners. Occupational…
- PKD Short for phenylketonuria. See: Phenylketonuria.