pinacle

CONT: The pinnacles terminating the buttresses are at first sometimes square, as at Bishop's Cleeve, Gloucestershire, which is of transitional Norman character: they are not very numerous in the Early English style, and often consist merely of an octagonal shaft with a pyramidal capping; afterwards, particularly in large buildings, they are either round or octagonal, with shafts at the angles, sometimes supporting small arches, and terminating in a plain conical capping.