Presbytery.—The part of a church where the high altar stands.
Reredos.—A screen at the back of an altar.
Rood-Loft.—A gallery over the screen separating the nave from the chancel, on which the great cross or rood was fixed.
Sedilia.—The seats for the officiating clergy.
Soffit.—The under side of an arch, cornice, etc.
Spandrel.—The triangular space between arches.
Splay.—The expansion given to windows and other openings by slanting the sides.
Springing.—The point at which an arch unites with its support.
Squint.—An oblique opening in the wall of a church.
Stoup.—A vessel or stone basin formed in the wall, serving as a receptacle for holy water.