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aeroallergen

Scientific  
/ âr′ō-ăl′ər-jən /

  1. Any of various airborne substances, such as pollen or spores, that can cause an allergic response.

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.