/ Dictionary / Index Z zirconium oxide: Meaning and Definition of Find definitions for: zirco'nium ox'ide Pronunciation: (zûr-kō'nē-u), [key] a white, heavy, amorphous, odorless and tasteless, infusible, water-insoluble powder, ZrO, used chiefly as a pigment for paints, an abrasive, and in the manufacture of refractory crucibles. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zirconium zirconyl Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language