Plaster of paris

noun

Definitions

Noun
  1. 1
    A hemihydrate of calcium sulfate, made by calcining gypsum, that hardens when moistened and allowed to dry; used to make casts, molds and sculpture. uncountable

    "Treatment of an acute occult dislocation of the ankle consists of immobilization in a snugly fitting plaster-of-paris cast, with little padding."

  2. 2
    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 wordnet

Etymology

So named after a large gypsum deposit at Montmartre, Paris.

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