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voussoir

[voo-swahr] /vuˈswɑr/
noun, Architecture
1.
any of the pieces, in the shape of a truncated wedge, that form an arch or vault.
Origin of voussoir
1325-1375
1325-75; < French; replacing Middle English vousor(i)e < Anglo-French; Old French volsoir < Vulgar Latin *volsōrium, equivalent to *volt(us) (for Latin volūtus), past participle of volvere to turn + -tōrium -tory2 with tt > s
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for voussoir

voussoir

/vuːˈswɑː/
noun
1.
a wedge-shaped stone or brick that is used with others to construct an arch or vault
Word Origin
C18: from French, from Vulgar Latin volsōrium (unattested), ultimately from Latin volvere to turn, roll
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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