4 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Irritant \Ir"ri*tant\, a. [L. irritans, -antis, p. pr of
irritare: cf F. irritant. See {Irritate} to excite.]
Irritating; producing irritation or inflammation.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Irritant \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.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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.
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.
From WordNet r 1.6 [wn]:
irritant
n : something that causes irritation and annoyance; "he's a
thorn in my flesh" [syn: {thorn}]
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