Plaster-of-paris meaning

plăstər
Any of a group of gypsum cements, essentially hemihydrated calcium sulfate, CaSO4 ·12 H2 O, a white powder that forms a paste when it is mixed with water and then hardens into a solid, used in making casts, molds, and sculpture.
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Any of a group of gypsum cements, essentially hemihydrated calcium sulfate, CaSO4 ·12 H2 O, a white powder that forms a paste when it is mixed with water and then hardens into a solid, used in making casts, molds, and sculpture.
noun
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Plaster of Paris is a powder that forms a paste when mixed with water and then thickens and hardens.

An example of plaster of Paris is one of the materials used to create a cast for a broken arm.

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A heavy white powder, calcined gypsum, which, when mixed with water, forms a thick paste that sets quickly: used for casts, moldings, statuary, etc.
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A form of calcium phosphate derived from gypsum. It is mixed with water to make casts and molds.
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A hemihydrate of calcium sulfate, made by calcining gypsum, that hardens when moistened and allowed to dry; used to make casts, molds or sculpture.
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Origin of plaster-of-paris

  • Middle English after Paris France

    From American Heritage Dictionary of the English Language, 5th Edition