Totally silent, it appears, over archi­tectural feature

• Convex molding
• Rounded convex molding
• Molding shape
• Quarter-rounded molding
• A convex molding having a cross section in the form of a quarter of a circle or of an ellipse
• Thumb small book with two rings binding
• Curved molding

WordNet Word definitions in WordNet
n. a convex molding having a cross section in the form of a quarter of a circle or of an ellipse [syn: thumb , quarter round ] [also: ovoli (pl)]

Wikipedia Word definitions in Wikipedia
Ovolo (or ovulo) in architecture , is a convex molding known also as the echinus, which in classical architecture was invariably carved with the egg-and-dart ornament. The molding is called a quarter-round by woodworkers. This is not to be conflated with ...