[ al-er-juh n, -jen ]
/ ˈæl ər dʒən, -ˌdʒɛn /
any substance, often a protein, that induces an allergy: common allergens include pollen, grasses, dust, and some medications.
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Words nearby allergen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for allergen
/ (ˈæləˌdʒɛn) /
any substance capable of inducing an allergy
Derived forms of allergenallergenic, adjectiveallergenicity, noun
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
Medical definitions for allergen
[ ăl′ər-jən ]
A substance, such as pollen, that causes an allergy.
Other words from allergenal′ler•gen′ic (-jĕn′ĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for allergen
[ ăl′ər-jən ]
A substance, such as pollen, that causes an allergic reaction.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.