contactant

contactant

[kuhn-tak-tuhnt]
noun Medicine/Medical.
any substance that might induce an allergy by coming in contact with the skin or a mucous membrane.

Origin:
contact + -ant

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

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