gypsum

1. A common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris) (synset 114701939)
   is a type of:

   • mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
   • calcium sulfate, calcium sulphate - a white salt (CaSO4)
   subtypes:

   • alabaster - a compact fine-textured, usually white gypsum used for carving
   • gesso - gypsum or plaster of Paris spread on a surface to make it suitable for painting or gilding (or a surface so prepared)
   • terra alba - finely pulverized gypsum used especially as a pigment
   substance holonym: atomic number 20, ca, calcium - a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
   substance meronym: plaster, plaster of paris - any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs

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