Allergen meaning

ăl'ər-jən
A substance, such as pollen, that causes an allergy.
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A substance inducing an allergic state or reaction.
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A substance, such as pollen, that causes an allergy.
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A substance, such as pollen, that causes an allergic reaction.
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(medicine) A substance which causes an allergic reaction.

Pollen, dust, and spores are common allergens.

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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