/ Dictionary / Index E epithecium: Meaning and Definition of Find definitions for: ep•i•the•ci•um Pronunciation: (ep"u-thē'shē-um, -sē-um), [key] — pl. -ci•a the surface layer of tissue of the fruiting body of lichens and fungi, formed by the union of the tips of the paraphyses over the spore sacs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epithalamus epithelialize Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language