/ Dictionary / Index E epithelium: Meaning and Definition of Find definitions for: ep•i•the•li•um Pronunciation: (ep"u-thē'lē-um), [key] — pl. -li•ums, -li•a any animal tissue that covers a surface, or lines a cavity or the like, and that, in addition, performs any of various secretory, transporting, or regulatory functions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: epithelium (Thesaurus) epitheliomuscular epithet Related Content Daily Word Quiz: crockery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language