Source : Webster's Revised Unabridged Dictionary (1913)

Dyspeptic \Dys*pep"tic\, Dyspeptical \Dys*pep"tic*al\, a.
   Pertaining to dyspepsia; having dyspepsia; as, a dyspeptic or
   dyspeptical symptom.

Dyspeptic \Dys*pep"tic\, n.
   A person afflicted with dyspepsia.

Source : WordNet®

dyspeptic
     adj 1: suffering from dyspepsia
     2: irritable as if suffering from indigestion [syn: {atrabilious},
         {bilious}, {liverish}]
     n : a person suffering from indigestion