'Irascible' definitions:

Definition of 'irascible'

(from WordNet)
adjective
Quickly aroused to anger; "a hotheaded commander" [syn: choleric, irascible, hotheaded, hot-tempered, quick-tempered, short-tempered]
adjective
Characterized by anger; "a choleric outburst"; "an irascible response" [syn: choleric, irascible]

Definition of 'Irascible'

From: GCIDE
  • Irascible \I*ras"ci*ble\, a. [L. irascibilis, fr. irasci to be angry, ira anger: cf. F. irascible. See Ire.] Prone to anger; easily provoked or inflamed to anger; choleric; irritable; as, an irascible man; an irascible temper or mood. -- {I*ras"ci*ble*ness}, n. -- {I*ras"ci*bly}, adv. [1913 Webster]