Arch. [n. of action f. L. cuspidāre: see prec.] Decoration with cusps; cusping.
1848. Rickman, Archit., App. 57. The feathering or cuspidation of arches in tracery.
1890. Athenæum, 11 Oct., 489/1. One of the … characteristics of the Early English doorways in Gottland is the frequency of cuspidation in the heads and down the sides of those openings.
