/ Dictionary / Index E epitaxis: Meaning and Definition of Find definitions for: ep•i•tax•is Pronunciation: (ep"i-tak'sis), [key] — pl. -tax•es an oriented overgrowth of crystalline material upon the surface of another crystal of different chemical composition but similar structure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epitasis epitaxy Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language