/ Dictionary / Index I interfertile: Meaning and Definition of Find definitions for: in•ter•fer•tile Pronunciation: (in"tur-fûr'tl), [key] — adj. Bot., Zool. able to interbreed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. interferon interfibrillar Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language