Source : Webster's Revised Unabridged Dictionary (1913)

Bellyache \Bel"ly*ache`\, n.
   Pain in the bowels; colic.

Source : WordNet®

bellyache
     v : complain; "What was he hollering about?" [syn: {gripe}, {grouse},
          {crab}, {beef}, {squawk}, {holler}]

bellyache
     n : an ache localized in the stomach or abdominal region [syn: {stomachache},
          {stomach ache}, {gastralgia}]