cyma

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cyma, cima (pl. cymae). Projecting moulding, common in Classical architecture, with an ogee section, usually of equal convex and concave arcs, with a plain fillet above and below it. There are two main types: the cyma recta, or Doric cyma, usually found at the top of a cornice, with the concave part uppermost (called cymatium), and the cyma reversa, Lesbian cymatium, or reverse ogee, with the convex part uppermost, usually part of the bed-mouldings of a cornice or the exterior moulding of architraves.