/ Dictionary / Index R rutile: Meaning and Definition of Find definitions for: ru•tile Pronunciation: (r'tēl, -tīl), [key] — n. a common mineral, titanium dioxide, TiO, usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rutile (Thesaurus) rutilated rutin Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language