The Collaborative International Dictionary of English v.0.48:

Choleric \Chol"er*ic\, a. [L. cholericus, Gr. ?: cf. F.
   chol['e]rique.]
   1. Abounding with, or producing choler, or bile. --Dryden.
      [1913 Webster]

   2. Easily irritated; irascible; inclined to anger.
      [1913 Webster]

   3. Angry; indicating anger; excited by anger. "Choleric
      speech." --Sir W. Raleigh.
      [1913 Webster]

   Choleric temperament, the bilious temperament.
      [1913 Webster]

WordNet (r) 3.0 (2006):

choleric
    adj 1: easily moved to anger; "men of the choleric type take to
           kicking and smashing"- H.G.Wells
    2: quickly aroused to anger; "a hotheaded commander" [syn:
       choleric, irascible, hotheaded, hot-tempered, quick-
       tempered, short-tempered]
    3: characterized by anger; "a choleric outburst"; "an irascible
       response" [syn: choleric, irascible]

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "choleric":
   acerb, acerbate, acerbic, acid, acidic, acidulent, acidulous,
   acrimonious, ambivert, angry, bilious, bitter, burning, captious,
   carping, caustic, cranky, cycloid, cyclothyme, cyclothymic,
   dyspeptic, ectomorph, embittered, endomorph, extrovert,
   faultfinding, fiery, heated, hot-tempered, indignant, introvert,
   irate, ireful, jaundiced, mad, melancholic, mesomorph, phlegmatic,
   quick-tempered, rancorous, rankled, ratty, resentful, resenting,
   sanguine, schizoid, schizothyme, sore, sour, sour-tempered, soured,
   splenetic, spunky, stewing, syntone, testy, tetchy, touchy,
   vinegarish, virulent, waxy, wrathful, wrathy, wroth