[kuh n-tak-tuh nt]
any substance that might induce an allergy by coming in contact with the skin or a mucous membrane.
Origin of contactant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Any of a group of allergens that elicit manifestations of induced sensitivity by direct contact with the skin or mucosa.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.