allergen
Americannoun
noun
Other Word Forms
Etymology
Origin of allergen
Vocabulary lists containing allergen
Microbiology - High School
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Microbiology - Middle School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
If you’re never exposed to an allergen, you can’t develop an allergy, and this would result in fewer allergies in the community, the theory went.
From Slate ● Dec. 3, 2025
The team discovered that when pest control successfully reduced cockroach numbers, both allergen and endotoxin levels dropped sharply.
From Science Daily ● Nov. 4, 2025
An estimated 40,000 children avoided peanut allergy diagnoses after the guidelines for when to first expose kids to the food allergen changed, according to new research.
From Los Angeles Times ● Oct. 20, 2025
The containers were found to be mistakenly filled with Friendly’s Cookies and Cream ice cream, which means there is an undisclosed wheat and soy allergen.
From Salon ● Aug. 12, 2025
By their constant contact with the chemicals these men keep themselves desensitized — as an allergist keeps his patients desensitized by repeated small injections of the allergen.
From "Silent Spring" by Rachel Carson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
