allergen

[ al-er-juh n, -jen ]
/ ˈæl ər dʒən, -ˌdʒɛn /
SEE SYNONYMS FOR allergen ON THESAURUS.COM

noun Immunology.

any substance, often a protein, that induces an allergy: common allergens include pollen, grasses, dust, and some medications.

Origin of allergen

First recorded in 1910–15; aller(gy) + -gen

Words nearby allergen

allende meteorite, allende, salvador, allenstein, allentown, alleppey, allergen, allergenic, allergenic extract, allergic, allergic conjunctivitis, allergic purpura

Words related to allergen

dander, irritant, pollen, antigen, ragweed

British Dictionary definitions for allergen

allergen
/ (ˈæləˌdʒɛn) /

noun

any substance capable of inducing an allergy

Derived forms of allergen

allergenic, adjective allergenicity, noun

Medical definitions for allergen

allergen
[ ăl′ər-jən ]

n.

A substance, such as pollen, that causes an allergy.
antigen

Other words from allergen

al′ler•gen′ic (-jĕn′ĭk) adj.

Scientific definitions for allergen

allergen
[ ăl′ər-jən ]

A substance, such as pollen, that causes an allergic reaction.