Source : Webster's Revised Unabridged Dictionary (1913)

Hydrophid \Hy"dro*phid\, n. [Hydro-, 1 + Gr. ? a small serpent.]
   (Zo["o]l.)
   Any sea snake of the genus {Hydrophys} and allied genera.
   These snakes are venomous, live upon fishes, and have a
   flattened tail for swimming.