The Ovolo
The Ovolo is composed of a full convex curve, either a quarter circle or slightly elliptic, which in height is equal to projection; and a fillet at base one-fifth the total height. Frequently this lower member is in the form of a half round bead of the same dimension as the fillet.
As a Bracketing moulding the Ovolo occurs in the capital of the Doric column, and in the Ionic and Corinthian cornices under the corona or facia, and is employed in other positions, where the sense of support is justified.