Definitions for: Irritant


[n] something that causes irritation and annoyance; "he's a thorn in my flesh"



Webster (1913) Definition: 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.

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.


Ir"ri*tant, a. [L. irritans, -antis, p. pr. of
irritare: cf. F. irritant. See Irritate to excite.]
Irritating; producing irritation or inflammation.


Ir"ri*tant, n. [Cf. F. irritant.]
1. That which irritates or excites.

2. (Physiol. & Med.) Any agent by which irritation is
produced; as, a chemical irritant; a mechanical or
electrical irritant.

3. (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.

Synonyms: thorn

See Also: annoyance, bother, botheration, infliction, pain, pain in the ass, pain in the neck

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