Allergen Definition

ălər-jən
allergens
noun
A substance inducing an allergic state or reaction.
Webster's New World
A substance, such as pollen, that causes an allergy.
American Heritage Medicine

(medicine) A substance which causes an allergic reaction.

Pollen, dust, and spores are common allergens.
Wiktionary

Other Word Forms of Allergen

Noun

Singular:
allergen
Plural:
allergens

Origin of Allergen

  • German Allergen Aller(gie) allergy allergy -gen -gen (from French -gène –gen)

    From American Heritage Dictionary of the English Language, 5th Edition

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