The Probert Encyclopaedia of Architecture

FINIAL

Finial is a term used in Gothic architecture to describe the ornamental top of a gable, pinnacle, minaret, buttress or spire. The earliest finials, in the later half of the 10th century, were representations of bunches of leaves; but later developments of the same period are marked by greater elaboration.
In scaffolding, a finial is a fitting designed to hold a horizontal tube directly above the vertical tubes so as to form a guard rail or barrier. Finials are available in both fixed, for making right-angled joints and swivelling for producing joints at other angles.
Research Finial