what is calcium sulfate
Definition of CALCIUM SULFATE. : a white salt CaSO4 that occurs especially as anhydrite, gypsum, and plaster of paris and that in hydrated form is used as a building material and in anhydrous form is used as a drying agent. See calcium sulfate defined for kids.ADVERTISEMENT.edical Definition of CALCIUM SULFATE. : a white calcium salt CaSO4 used especially as a diluent in tablets and in hydrated form as plaster of paris.