APPENDIX 2

Some Technical Terms Explained
Only less familiar architectural terms are included, and only those which
have not already been explained in the places where they fast occurred
in the text. Note.—Bracketed references refer to drawings illustrating
technical terms in this appendix.
Ambulatory: Aisle round an apse or a circular building.
Arcade: Group of arches on columns or pillars.
Architrave: Bottom member of an entablature (€.3).
Attic: Low story above main cornice.
Basilica: Church with aisles and a nave higher than the aisles.
Bay: Vertical unit of a wall or facade; also compartments into which a
nave is divided.
Caryatid: Sculptured figure used as a support.
Clerestory: Upper part of church nave with windows above the roofs of
the aisles.
Cornice: Projecting top portion of an entablature or any projecting top
course of a building (A.3 and C.4).
Cross: Cf. Greek cross.
Cross Rib: (E.i).
Drum: Circular or polygonal structure on which a dome is raised (B.i).
Entablature: The horizontal top part of an order of classical architecture.
It is supported by columns and consists of architrave, frieze and
cornice (C.s).
Greek Cross: Cross with all four arms of equal length.
Jamb: Vertical part of the masonry of a door or window (D.i).
Lantern: Small open or glazed structure crowning a dome or a roof (B.2).
Lierne: A decorative rib in a Gothic vault which does not spring from the
wall and does not touch the central boss (£.5).
Metope: Panel filling the space between triglyphs (C.i). See Triglyph.
Mullion: Vertical division of a window.
Narthex: Porch in front of the nave and aisles of a mediaeval church.
Ogee Arch: (D),
Pediment: Triangular or segmental upright front end of a roof of moder-
ate pitch (A.i).
Plinth: Projecting base of a building or a column.
Quoins: Corner stones at the angle of a building (A.2).
Ridge Rib: (£.3).
Rustication: Wall treatment with large freestone blocks, either smooth
with recessed joints, or with a rough, rock-like surface and recessed
joints.
Solar: Chamber on an upper floor.
BJL—16 223