plaster of Paris

English

Alternative forms
  • plaster-of-Paris (attributive use)

Etymology

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

Noun

plaster of Paris (uncountable)

  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.
    • 1954 February 15, D. Keith Millett, Myron O. Henry, “Occult Ankle Dislocations”, in Modern Medicine, volume 22, number 4, Minneapolis, Minn.: Modern Medicine Publications, Inc., page 93:
      Treatment of an acute occult dislocation of the ankle consists of immobilization in a snugly fitting plaster-of-paris cast, with little padding.

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