Source : Webster's Revised Unabridged Dictionary (1913)

Bilious \Bil"ious\ (b[i^]l"y[u^]s), a. [L. biliosus, fr. bilis
   bile.]
   1. Of or pertaining to the bile.

   2. Disordered in respect to the bile; troubled with an excess
      of bile; as, a bilious patient; dependent on, or
      characterized by, an excess of bile; as, bilious symptoms.

   3. Choleric; passionate; ill tempered. ``A bilious old
      nabob.'' --Macaulay.

   {Bilious temperament}. See {Temperament}.