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.
Improve indoor air quality: Consider using high-efficiency particulate air (HEPA) filters to remove airborne allergens in your home. Lindsay Curtis, Health, 12 Apr. 2025 In December 2024, Frito-Lay recalled over 6,300 bags of Lay's Classic Potato Chips, also due to an undeclared milk allergen. Abby Norman, Verywell Health, 10 Apr. 2025 This drug-free nasal suction device works quickly to soothe nasal passages by sucking out mucus, allergens and germs. Nora Colomer, FOXNews.com, 5 Apr. 2025 But allergens can also trigger more serious complications like asthma attacks, causing wheezing, chest tightness, and shortness of breath. Umair Irfan, Wired News, 5 Apr. 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

Browse Nearby Words

Cite this Entry

“Allergen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/allergen. Accessed 17 Apr. 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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