voussoir
nounOne of the wedge-shaped stones forming the curved parts of an arch or vaulted ceiling.
To form with voussoirs; construct by means of voussoirs.
nounIn architecture, a stone in the shape of a truncated wedge, which forms part of an arch.
nounOne of the wedgelike stones of which an arch is composed.
nounOne of a series of
wedge-shaped stone building block used in constructing an arch or vault