calcium arsenate

noun

Definition of calcium arsenate

  1. :  an arsenate of calcium [as the normal tricalcium arsenate Ca3(AsO4)2 or a basic salt 3Ca3(AsO4)2·Ca(OH)2]; especially :  a commercial mixture obtained as a white powder usually by heating arsenic pentoxide and calcium hydroxide in water and used as an insecticide especially in the form of a dust

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