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Synonyms

allergen

American  
[al-er-juhn, -jen] / ˈæl ər dʒən, -ˌdʒɛn /

noun

Immunology.

  1. any substance, often a protein, that induces an allergy: common allergens include pollen, grasses, dust, and some medications.

allergen British  
/ ˈæləˌdʒɛn /

noun

  1. any substance capable of inducing an allergy

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
allergen Scientific  
/ ăl′ər-jən /

  1. A substance, such as pollen, that causes an allergic reaction.

Other Word Forms

  • allergenic adjective
  • allergenicity noun

Etymology

Origin of allergen

First recorded in 1910–15; aller(gy) + -gen

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.