allergen

noun

al·​ler·​gen ˈa-lər-jən How to pronounce allergen (audio)
: a substance (such as pollen) that induces allergy
allergenic adjective
allergenicity noun

Examples of allergen in a Sentence

common allergens, such as pollen
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Using air purifiers to reduce airborne allergens; keeping the home free of dust and mold; and managing stress are also key to keeping your feline safe. Matt Robison, Newsweek, 25 Feb. 2025 The vacuum includes two HEPA filters and a five-stage filtration system that is able to capture 99.9 percent of fine particles so that your air is as purified as possible and free of potential allergens and irritants. Megan Schaltegger, People.com, 12 Feb. 2025 The company was informed that allergen ingredient information was missing during an inspection, and the recall was part of a corrective plan to address the gap. Abby Norman, Verywell Health, 5 Feb. 2025 People with EoE can develop symptoms within hours, days, or weeks after coming in contact with a food allergen. Lindsay Curtis, Health, 24 Jan. 2025 See All Example Sentences for allergen

Word History

Etymology

borrowed from German Allergen,, blend of allerg- (in Allergie allergy) and -gen (in Antigen antigen)

Note: See note at allergy.

First Known Use

circa 1907, in the meaning defined above

Time Traveler
The first known use of allergen was circa 1907

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Cite this Entry

“Allergen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/allergen. Accessed 1 Mar. 2025.

Kids Definition

allergen

noun
al·​ler·​gen ˈal-ər-jən How to pronounce allergen (audio)
: a substance (as pollen) that causes allergy
allergenic adjective

Medical Definition

allergen

noun
al·​ler·​gen ˈal-ər-jən How to pronounce allergen (audio)
: a substance that induces allergy
inhaled allergens
a suspected food allergen

More from Merriam-Webster on allergen

Last Updated: - Updated example sentences
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