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
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Wall mopping, a simple and effective method of cleaning the walls of your home, is a great way to keep walls clean and paint fresh, keep allergens like dust at bay, and prevent mold or mildew build-up. Kait Hanson, Southern Living, 3 Nov. 2024 While deadly reactions are rare, concerns about undeclared allergens are a relatively common reason that companies choose to initiate recalls. Gordon G. Chang, Newsweek, 31 Oct. 2024 Steam cleaner to deodorize, sanitize, and reduce allergens. Cody Godwin, USA TODAY, 31 Oct. 2024 In both cases, removing the allergen as soon as possible is important. Daniel More, Health, 24 Oct. 2024 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

Dictionary Entries Near allergen

Cite this Entry

“Allergen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/allergen. Accessed 15 Nov. 2024.

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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