/ Dictionary / Index C cubic zirconia: Meaning and Definition of Find definitions for: cu'bic zir•co'ni•a Pronunciation: (zûr-kō'nē-u), [key] — pl. -ni•as. an artificial crystal resembling a diamond in refraction, dispersion, hardness, and color, used in jewelry. Abbr.: CZ Sometimes, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cubiculum cubiform Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language