Source : Webster's Revised Unabridged Dictionary (1913)

Gaper \Gap"er\, n.
   1. One who gapes.

   2. (Zo["o]l.)
      (a) A European fish. See 4th {Comber}.
      (b) A large edible clam ({Schizoth[ae]rus Nuttalli}), of
          the Pacific coast; -- called also {gaper clam}.
      (c) An East Indian bird of the genus {Cymbirhynchus},
          related to the broadbills.