A decorative form consisting of two upright S-shaped curves positioned opposite one another with their concave sections placed at the top.

A pointed arch in which the arcs comprising it are centred on points both outside and inside the arch so that the point takes the form of a double S, or ogee.

A brace which is cut to a double curve.

A decorative S-shaped moulding, usually placed at the top of a cornice, with a convex lower half and a concave upper half.