Lexic.us

Definition of Allergy

1. Noun. Hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity.

Definition of Allergy

1. Noun. (pathology immunology) A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma. ¹

2. Noun. (pathology) Any condition of hypersensitivity to a substance. ¹

3. Noun. Altered susceptibility to a first treatment as exhibited in reaction to a subsequent one. ¹

4. Noun. (informal) An antipathy, as toward a person or activity. ¹

¹ Source: wiktionary.com

Definition of Allergy

1. a state of hypersensitive reaction to certain things [n -GIES]

Medical Definition of Allergy

1. 1. A state of hypersensitivity induced by exposure to a particular antigen (allergen) resulting in harmful immunologic reactions on subsequent exposures, the term is usually used to refer to hypersensitivity to an environmental antigen (atopic allergy or contact dermatitis) or to drug allergy. The original meaning, now obsolete, included all states of altered immunologic reactivity, immunity as well as hypersensitivity. Gell and Coombs used the term allergic reaction to mean any harmful immunologic reaction causing tissue injury. 2. The medical specialty dealing with diagnosis and treatment of allergic disorders. (18 Nov 1997)

Lexicographical Neighbors of Allergy

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