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).
Antidiuretic hormone (ADH)
A relatively small (peptide) molecule that is released by the pituitary gland at the base of the brain after being made nearby (in the hypothalamus). ADH has an antidiuretic action that prevents the production of dilute urine (and so is…
Read the definitionRandom terms
Show more- Gap junction An organized collections of protein channels in cell membranes that allows ions and small molecules to pass…
- Telangiectasia perstans A form of mastocytosis that usually affects adults, characterized by the presence of multiple hyperpigmented…
- Muir-Torre syndrome A genetic syndrome characterized by a combination of sebaceous tumors of the skin and one or more internal…
- Painful vulva Also called essential vulvodynia, a chronic, diffuse, unremitting sensation of burning of the vulva -- (the…
- Marasmus Wasting away, as occurs with children who have kwashiorkor. Also called cachexia, is usually a result of…
- Prehypertension A systolic pressure of 120 to 139 mm Hg or a diastolic pressure of between 80 and 89 mm Hg. Prehypertension…
- Vaccination, HIB This immunization is designed to prevent diseases caused by Haemophilus influenzae type B (HIB), a bacteria…
- Inotropic Affecting the force of muscle contraction. An inotropic heart drug is one that affects the force with which…
- Zolpidem Zolpidem: Brand name: Ambien. A sedative hypnotic drug in a class closely related the benzodiazepines…
- Vaccine, influenza The influenza (flu) vaccine is recommended for persons at high risk for serious complications from influenza…
- Trichoepithelioma A small benign tumor derived from basal cells in the hair follicle. Trichoepithelioma may occur sporadically…
- Memory 1. The ability to recover information about past events or knowledge. 2. The process of recovering…