a round concave hollow moulding containing the quadrant of a circle. Often found in a cornice.

in architecture, is the term given to a hollow concave molding sometimes employed in the place of the cymatium of a cornice, as in. that of the Done order of the theatre of Marcellus. It forms the crowning feature of the Egyptian temples, and took the place of the cymatium in many of the Etruscan temples.

A concave molding having a curve which approximates a quarter circle. Often found on cornices.

Concave molding often found as an important member of the cornice.

Concave quarter round molding.