arrière-voussure

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.