/ Dictionary / Index E exodermis: Meaning and Definition of Find definitions for: ex•o•der•mis Pronunciation: (ek"su-dûr'mis), [key] — n. Bot. a temporary, protective layer of cells in some roots, as in certain orchids. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Exod. exodontics 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