Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR KEYSTONES

Some were removed and used as keystones for the arches of Derrybawn bridge.

The keystones are ornamented with heads and other pieces of sculpture.

It was one of those glances which are as keystones to situations.

It is constructed of plain white Suffolk bricks, relieved with bands of red brick, keystones, and cornices of stone dressing.

This method is often advantageous in bridge work, where comparatively few ornaments are required, such as keystones.

It bears on the keystones of its three principal arches the suggestive date, "1740."

The keystones of the doorways and those of the window arches belong to this class, each bearing a single star.

Pedimented doorway, window caps, keystones, cornice and dormer trim follow the best mid-Georgian tradition.

The work of destruction was begun by knocking out the keystones of the vaulting and 34 allowing the roof to fall in.

The keystones of the central arch are adorned with sculptured masks of Thame and Isis.