/ Dictionary / Index C calcium metasilicate: Meaning and Definition of Find definitions for: cal'cium met•a•sil'i•cate Pronunciation: (met"u-sil'i-kit, -kāt"), [key] a white powder, CaSiO, insoluble in water, used as an antacid and as a filler for paper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. calcium light calcium nitrate Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language