Ar′ris, n.

n. [O. Fr. areste, N. Fr. arête, from Lat. arista, the top or beard of an ear of grain, the bone of a fish.] (Arch.) The edge formed by two surfaces meeting each other, whether plane or curved;—applied particularly to the edges in moldings, and to the raised edges which separate the flutings in a Doric column. P. Cyc.