al·​ler·​gen | \ ˈa-lər-jən How to pronounce allergen (audio) \

Definition of allergen

: a substance (such as pollen) that induces allergy

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Other Words from allergen

allergenic \ ˌa-​lər-​ˈje-​nik How to pronounce allergenic (audio) \ adjective
allergenicity \ ˌa-​lər-​jə-​ˈni-​sə-​tē How to pronounce allergenicity (audio) \ noun

Examples of allergen in a Sentence

common allergens, such as pollen

Recent Examples on the Web

Think of it like a cousin to peanut butter but one that's school-safe and free from the top eight allergens: peanuts, tree nuts, milk, eggs, fish, crustacean shellfish, wheat and soybeans. Alysha Witwicki, Milwaukee Journal Sentinel, "Sunflower seed butter is an allergen-free answer to nut butters, for baking and more," 30 Aug. 2019 The snacks are free of the top food allergens, including peanuts and nuts, wheat, dairy, soy and egg. San Diego Union-Tribune, "Granola bark steers clear of food allergies," 20 Aug. 2019 A dozen years ago the standard recommendation to new parents worried about their child developing an allergy to peanuts, eggs or other common dietary allergens was to avoid those items like the plague until the child was two or three years old. Claudia Wallis, Scientific American, "How to Prevent Food Allergies," 24 July 2019 Koch Foods, a chicken production company based in Fairfield, is recalling more than 700 pounds of its boneless chicken bites because of undeclared allergens, according to the U.S. Department of Agriculture’s Food Safety and Inspection Service. Rachel Berry,, "Koch Foods recalls chicken due to unnamed allergens," 18 July 2019 Electrostatic air filters are electro-magnetically charged to attract and trap small airborne particulates, including fine dust and allergens, which would pass right through fiberglass and pleated filters. Joseph Truini, Popular Mechanics, "A Breath of Fresh Air: A Smart Buyer's Guide to Air Filters," 1 July 2019 The original Impossible Burger recipe contains wheat and soy, both of which are common food allergens. Savannah Eadens, The Courier-Journal, "Looking for the Impossible Burger in Louisville? We made it possible," 17 May 2017 If allergens are an issue, natural wine may be a better option, suggests Feiring. NBC News, "What is natural wine? And is it better for you?," 11 Aug. 2019 All recipes are free from gluten and the top eight allergens – dairy, egg, fish, crustacean, shellfish, tree nuts, peanuts, wheat and soy. Catie Wegman,, "Fort Lauderdale mom creates baking club for children with dietary restrictions," 26 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'allergen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of allergen

circa 1907, in the meaning defined above

History and Etymology for allergen

International Scientific Vocabulary allergy + -gen

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Statistics for allergen

Last Updated

14 Sep 2019

Look-up Popularity

Time Traveler for allergen

The first known use of allergen was circa 1907

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More Definitions for allergen



English Language Learners Definition of allergen

medical : a substance that causes an allergy


al·​ler·​gen | \ ˈa-lər-jən How to pronounce allergen (audio) \

Kids Definition of allergen

: a substance that causes an allergic reaction


al·​ler·​gen | \ ˈal-ər-jən How to pronounce allergen (audio) \

Medical Definition of allergen

: a substance that induces allergy inhaled allergens a suspected food allergen

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More from Merriam-Webster on allergen

Spanish Central: Translation of allergen

Nglish: Translation of allergen for Spanish Speakers

Britannica English: Translation of allergen for Arabic Speakers Encyclopedia article about allergen

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