/ Dictionary / Index S sea cow: Meaning and Definition of Find definitions for: sea' cow" Pronunciation: [key] any sirenian, as the manatee or dugong. the hippopotamus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seacock sea cradle Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language