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.

Synonyms

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Further reading
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