/ Dictionary / Index E ephippium: Meaning and Definition of Find definitions for: e•phip•pi•um Pronunciation: (i-fip'ē-um), [key] — pl. e•phip•pi•a a thick shell, consisting of two chitinous plates, that encloses and protects the winter eggs of a cladoceran. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ephesus ephod Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language