Cymatium

cymatium - (architecture) a molding for a cornice; in profile it is shaped like an S (partly concave and partly convex)
cyma
cyma recta - a cyma in which the upper section is concave and the lower section is convex ...

Lesbian cymatium - A cyma reversa moulding often decorated with leaf and dart.

Cymatium
A small cyma is called a cymatium. When a cyma is used as the crown moulding of an entablature, it is called a cymatium.
Dentils ...

Cymatium - a molding on the cornice of some classical buildings.
cyrto-style - circular projecting portico with columns, like those of the transept entrances of St Paul's cathedral and the western entrance of St Mary-le-Strand, London.
D ...

Ante-fixae (from Latin antefigere, to fasten before), the vertical blocks which terminate the covering tiles of the roof of a Greek temple; as spaced they take the place of the cymatium and form a cresting along the sides of the temple.

See also: Greek, Architecture, Cornice, Ornament, Profile