INTERPENETRATE v.
er; to penetrate between bodies or their parts. Interpenetrating molding (Arch.), in late Gothic architecture, a decoration by means of moldings which seem to pass through solid uprights, transoms, or other members; often, two sets of architectural members penetrating one another, in appearance, as if both had been pla…
PENDANT n.
A hanging ornament on roofs, ceilings, etc., much used in the later styles of Gothic architecture, where it is of stone, and an important part of the construction. There are imitations in plaster and wood, which are mere decorative features. "[A bridge] with . . . pendants graven fair." Spenser.
RIB n.
In Gothic vaulting, one of the primary members of the vault. These are strong arches, meeting and crossing one another, dividing the whole space into triangles, which are then filled by vaulted construction of lighter material. Hence, an imitation of one of these in wood, plaster, or the like.