/ Dictionary / Index C calcium arsenate: Meaning and Definition of Find definitions for: cal'cium ar'senate Pronunciation: [key] a white, slightly water-soluble, poisonous powder, Ca(AsO), used as an insecticide and as a germicide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. calcium calcium blocker Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language