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Webster 1913 Edition

Noun.

[

Hydro-

, 1 + Gr. [GREEK] a small serpent.]

(Zool.)

Any sea snake of the genus

Hydrophys

and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming.

hydrophid ‎(plural hydrophids)

(zoology) Any sea snake of the subfamily Hydrophiinae, venomous, preying on fishes, with a flattened tail for swimming.