arrière-voussure

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arrière-voussure

[′ar·ē‚er‚vü′su̇r]
(building construction)
An arch or vault in a thick wall carrying the thickness of the wall, especially one over a door or window frame.
A relieving arch behind the face of a wall.

arrière-voussure, rear arch

arrière-voussure
1. A rear vault; an arch or vault in a thick wall carrying the thickness of the wall, esp. one over a door or window frame.
2. A relieving arch behind the face of a wall.