Source : Webster's Revised Unabridged Dictionary (1913)

Sea wing \Sea" wing`\ (Zo["o]l.)
   A wing shell ({Avicula}).

Avicula \A*vic"u*la\, n. [L., small bird.] (Zo["o]l.)
   A genus of marine bivalves, having a pearly interior, allied
   to the pearl oyster; -- so called from a supposed resemblance
   of the typical species to a bird.