/ Dictionary / Index C calcium oxalate: Meaning and Definition of Find definitions for: cal'cium ox'alate Pronunciation: [key] a white, crystalline powder, CaCO, insoluble in water, used in making oxalic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. calcium nitrate calcium oxide Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language