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[kuh n-tak-tuh nt] /kənˈtæk tənt/
noun, Medicine/Medical
any substance that might induce an allergy by coming in contact with the skin or a mucous membrane.
Origin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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contactant in Medicine

contactant con·tac·tant (kən-tāk'tənt)
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.
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