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contactant

[kuh n-tak-tuh nt]
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noun Medicine/Medical.
  1. any substance that might induce an allergy by coming in contact with the skin or a mucous membrane.
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Origin of contactant

contact + -ant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
contactant in Medicine

contactant

(kən-tăk′tənt)
n.
  1. Any of a group of allergens that elicit manifestations of induced sensitivity by direct contact with the skin or mucosa.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.