Source : Webster's Revised Unabridged Dictionary (1913)

Crappie \Crap"pie\ (kr?p"p?), n. (Zo["o]l.)
   A kind of fresh-water bass of the genus {Pomoxys}, found in
   the rivers of the Southern United States and Mississippi
   valley. There are several species. [Written also {croppie}.]

Source : WordNet®

crappie
     n 1: small sunfishes of the genus Pomoxis of central United
          States rivers
     2: small sunfishes of central United States rivers