irritant : Idioms & Phrases
chemical irritant
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noun a substance producing irritation
WordNet
Counter irritant
(Med.) , an irritant to produce a blister, a pustular eruption, or other irritation in some part of the body, in order to relieve an existing irritation in some other part. "Counter irritants are of as great use in moral as in physical diseases." Macaulay.
Webster 1913
Pure irritant
(Toxicology) , a poison that produces inflammation without any corrosive action upon the tissues.
