Mullion.—Perpendicular bar between the lights of windows in Gothic architecture.
Nail-headed Moulding.—Moulding in imitation of ornamental nail-heads.
Newell.—The column round which a spiral staircase winds.
Ogee.—A moulding partly concave and partly convex, forming a round and a hollow. Term also applied to an arch formed of contrasted curves.
Orders.—The recesses of a divided arch.
Parvise.—A small room over the porch.
Pilaster.—A pillar, sometimes disengaged but generally attached to a wall.
Piscina.—A basin attached to the wall near the altar of a church, where the priest washed his hands and rinsed the chalice.
Plate-Tracery.—Tracery which appears as if formed by piercing a flat surface with ornamental patterns.
Plinth.—The lowest division of the base of a column, or projecting face at the bottom of a wall.