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contactant

American  
[kuhn-tak-tuhnt] / kənˈtæk tənt /

noun

Medicine/Medical.

  1. any substance that might induce an allergy by coming in contact with the skin or a mucous membrane.

Etymology

Origin of contactant

contact + -ant

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.