flute

In architecture, molding refers to a decorative element that outlines edges and surfaces, such as a cornice or base. Moldings can be flat, like a fillet or bevel, or curved, such as a cavetto (concave) or torus (convex). They can also be compound, like a cyma recta or cyma reversa.12

Fluting specifically involves creating a series of regular, vertical concave grooves. This technique is often used on columns in Classical architecture, with the number of flutes varying by order. Sometimes, these flutes are partially filled with a convex molding called a bead, creating a "cabled" effect. Fluting and reeding (convex ridges) are decorative elements that add order and richness to architectural designs.32