fluting

Concave fluting on Doric order columns; Northington Grange, a Greek Revival building of 1804–1817

Fluting in architecture and the decorative arts consists of shallow grooves running along a surface. The term typically refers to the curved grooves (flutes) running vertically on a column shaft or a pilaster, but is not restricted to those two applications. If the scoops taken out of the material meet in a sharp ridge, the ridge is called an arris. If the raised ridge between two flutes appears flat, the ridge is a fillet. Fluted columns are common in the tradition of classical architecture but were not invented by the ancient Greeks, but rather passed down or learned from the Mycenaeans or the Egyptians.