Found 2 items, similar to irritant.
English → English (WordNet) Definition: irritant irritant n : something that causes irritation and annoyance; “he's a thorn in my flesh” [syn: thorn]
English → English (gcide) Definition: Irritant Irritant \Ir"ri*tant\, a. [LL. irritants, -antis, p. pr. of irritare to make null, fr. L. irritus void; pref. ir- not + ratus established.] (Scots Law) Rendering null and void; conditionally invalidating. [1913 Webster] The states elected Harry, Duke of Anjou, for their king, with this clause irritant; that, if he did violate any part of his oath, the people should owe him no allegiance. --Hayward. [1913 Webster] Irritant \Ir"ri*tant\, a. [L. irritans, -antis, p. pr. of irritare: cf. F. irritant. See Irritate to excite.] Irritating; producing irritation or inflammation. [1913 Webster] Irritant \Ir"ri*tant\, n. [Cf. F. irritant.] [1913 Webster] 1. That which irritates or excites. [1913 Webster] 2. (Physiol. & Med.) Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant. [1913 Webster] 3. (Toxicology) A poison that produces inflammation. [1913 Webster] Counter irritant. See under Counter. Pure irritant (Toxicology), a poison that produces inflammation without any corrosive action upon the tissues. [1913 Webster]