Voussoir

//vuˈswɑːr// noun

Definitions

Noun
  1. 1
    One of a series of wedge-shaped bricks or stones forming an arch or vault.

    "It is the voussoir depth in a real arch which enables the arch to carry wider ranges of loading; a large number of different idealized centre-line arches can be contained within a given practical profile. ...[T]his must be so, or no mediaeval bridge would have survived its decentering."

  2. 2
    wedge-shaped stone building block used in constructing an arch or vault wordnet

Etymology

Unadapted borrowing from French voussoir, from Old French vosoir, from Vulgar Latin *volsorium, from *volsus, from Latin volvō (“I roll”).

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