plaster of Paris

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English[edit]

Etymology[edit]

So called after a large gypsum deposit at Montmartre in Paris.

Noun[edit]

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[edit]

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