Webster's Revised Unabridged Dictionary · 1913

Gaper

Gaper (gāp"ẽr) , noun

1.
One who gapes.
2.
(a) (Zoology) A European fish. See 4th Comber.
(b)
(Zoology) A large edible clam (Schizotharus Nuttalli), of the Pacific coast; -- called also gaper clam.
(c)
(Zoology) An East Indian bird of the genus Cymbirhynchus, related to the broadbills.