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).
Allergic reaction
The hypersensitive response of the immune system of an allergic individual to a substance. When an allergen enters the body, it causes the body's immune system to develop an allergic reaction in a person with an allergy to it. This…
Read the definitionRandom terms
Show more- Allergic contact dermatitis A red, itchy, weepy reaction where the skin has come into contact with a substance that the immune system…
- Furuncle Nothing more nor less than a 'boil' with a fancy name. A boil is a collection of pus. Antibiotics are often…
- Amnesia Lack of memory. Amnesia after trauma can be antegrade or retrograde, depending upon whether the lack of…
- Joint, acromioclavicular The acromioclavicular (AC) joint is located between the acromion (a projection of the scapula that forms the…
- Calcimimetic A drug in a class of orally active, small molecules that decrease the secretion of parathyroid hormone (PTH)…
- Lansing virus Type 2 poliovirus. Named after the city in Michigan where the first patient lived who was found to have this…
- Dystonia, cranial A term used to describe dystonia that affects the muscles of the head, face, and neck. Oromandibular dystonia…
- Signal transduction A basic process in molecular cell biology involving the conversion of a signal from outside the cell to a…
- Heterotopic In the wrong place, in an abnormal place, misplaced. From the Greek roots 'hetero-' meaning 'other' + 'topos'…
- Perfluorinated acid A type of chemical that repels water and oil and is resistant to heat and chemical stress. Perfluorooctanoic…
- Smallpox vaccination in eczema See Eczema vaccinatum
- Myxedema, infantile Hypothyroidism (subnormal activity of the thyroid gland) that starts after birth and is manifest by features…