anhydrous gypsum plaster
11calcium — /kal see euhm/, n. Chem., Biol. a silver white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element… …
12calcium sulfate — n a white calcium salt CaSO4 used esp. as a diluent in tablets and in hydrated form as plaster of paris * * * [NF] the sulfate salt of calcium, CaSO4, found commonly in nature in the anhydrous form (anhydrite) and in a hydrated form known as… …
13calcium sulfate — noun Date: 1869 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 …
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