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Definition of allergen

allergen

/ˈæl.ɚ.dʒən/
al · ler · gen
Plural:allergens
•
Adjective:allergenic
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allergen Lexical Profile

allergen Game Scores & Validity

• noun

1

A substance, such as pollen, dust, or a specific food protein, that causes an allergic reaction when inhaled, ingested, or touched.

Example

"Food manufacturers are required by law to clearly list common allergens like peanuts and shellfish on their packaging."

Synonyms
View all synonyms for allergen

• Nearby Words

allegory
allegro
allentown
allergen
allergenic
allergic
allergist

Word Origin & Etymology

Coined in the early 20th century from German Allergen, a blend of Allergie ('allergy') and the suffix -gen ('producing', from Ancient Greek -genes).

Cite this Entry

Wordmom. (2026). Definition of Allergen. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/allergen
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