The Collaborative International Dictionary of English v.0.48:

Veliger \Vel"i*ger\ (v[e^]l"[i^]*j[~e]r), n. [NL., fr. L. velum
   a veil + gerere bear.] (Zool.)
   Any larval gastropod or bivalve mollusk in the stage when it
   is furnished with one or two ciliated membranes for swimming.
   [1913 Webster]