Ir"ri*tant (?), a. [LL. irritants, -antis, p. pr. of irritare to make null, fr. L. irritus void; pref. ir- not + ratus established.] ScotsLaw 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.
© Webster 1913.
Ir"ri*tant, a. [L. irritans, -antis, p. pr. of irritare: cf. F. irritant. See Irritate to excite.] Irritating; producing irritation or inflammation.
© Webster 1913.
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.
© Webster 1913. | 
