/ Dictionary / Index Q quartzite: Meaning and Definition of Find definitions for: quartz•ite Pronunciation: (kwôrt'sīt), [key] — n. a granular metamorphic rock consisting essentially of quartz in interlocking grains. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quartzite (Thesaurus) quartziferous quartz lamp Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language