plaster of Paris

or plaster of paris


noun

calcined gypsum in white, powdery form, used as a base for gypsum plasters, as an additive of lime plasters, and as a material for making fine and ornamental casts: characterized by its ability to set rapidly when mixed with water.

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Origin of plaster of Paris

1375–1425; late Middle English; so called because prepared from the gypsum of Paris, France
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for plaster of Paris

British Dictionary definitions for plaster of Paris

plaster of Paris

noun

a white powder that sets to a hard solid when mixed with water, used for making sculptures and casts, as an additive for lime plasters, and for making casts for setting broken limbs. It is usually the hemihydrate of calcium sulphate, 2CaSO 4 .H 2 O
the hard plaster produced when this powder is mixed with water: a fully hydrated form of calcium sulphate
Sometimes shortened to: plaster

Word Origin for plaster of Paris

C15: from Medieval Latin plastrum parisiense, originally made from the gypsum of Paris
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for plaster of Paris

plaster of Paris
[ părĭs ]

n.

Any of a group of gypsum cements, essentially hemihydrated calcium sulfate, a white powder that forms a paste when mixed with water and hardens into a solid, used in making casts and molds.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for plaster of Paris

plaster of Paris
[ plăstər ]

A form of calcium phosphate derived from gypsum. It is mixed with water to make casts and molds.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.