/ Dictionary / Index S sea snake: Meaning and Definition of Find definitions for: sea' snake" Pronunciation: [key] any of several venomous marine snakes of the family Hydrophidae, having a finlike tail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seasnail season Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language