Source : Webster's Revised Unabridged Dictionary (1913)

Appealable \Ap*peal"a*ble\, a.
   1. Capable of being appealed against; that may be removed to
      a higher tribunal for decision; as, the cause is
      appealable.

   2. That may be accused or called to answer by appeal; as, a
      criminal is appealable for manslaughter. [Obs.]

Source : WordNet®

appealable
     adj : capable of being appealed especially to a higher tribunal;
           "decisions...appealable to the head of the agency"- New
           Republic [ant: {unappealable}]