/ Dictionary / Index S seashell: Meaning and Definition of Find definitions for: sea•shell Pronunciation: (sē'shel"), [key] — n. the shell of any marine mollusk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: seashell (Thesaurus) sea serpent seashore Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language