n.
or pendent
In architecture, a sculpted ornament suspended from a vault or ceiling, especially an elongated boss (carved keystone) at the junction of the intersecting ribs of the fan vaulting associated with the English Perpendicular style .
In stone ceilings, the use of pendant vaulting was a solution to the difficulty of adapting fan vaulting to very wide church naves . Strong transverse arches were made to span the area, and these in turn supported the elongated keystones. Intermediate rib and panel vaults sprang from these pendants.