ogee

An arch composed of two opposing s-shaped curves, concave at the top and convex at the bottom. If the curves are convex at the top and concave at the bottom, it is called a reverse ogee.

'Mackintosh Architecture' led by The Hunterian, University of Glasgow, funded by the Arts and Humanities Research Council; with additional support from The Monument Trust, The Pilgrim Trust, and the Paul Mellon Centre for Studies in British Art; and collaborative input from Historic Scotland and the Royal Commission on the Ancient and Historical Monuments of Scotland.