Vōuzsoir, n.

(vōōs'swīr'), n. [Fr., allied to voûter, to vault, voûte, an arch, a vault, O. Fr. volte, It. & Pr. volta, from Lat. volvere, volūtum, to turn, turn round.] (Arch.) One of the wedge-like stones forming part of an arch. Gwilt.