The Collaborative International Dictionary
Pure irritant
Irritant \Ir"ri*tant\, n. [Cf. F. irritant.]
That which irritates or excites.
(Physiol. & Med.) Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant.
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(Toxicology) A poison that produces inflammation.
Counter irritant. See under Counter.
Pure irritant (Toxicology), a poison that produces inflammation without any corrosive action upon the tissues.