State or Territory
straight-sided construction, containing one or more windows, that projects from the face of a building and thereby forms a bay in the associated room
Bay windows come in rectangular, curved or polygonal plan shapes, and are carried on dwarf walls at ground level or brackets at upper levels. A curved bay window is called a bow window; one with splayed sides a cant bay window. A bay window that projects from an upper storey only, is called an oriel window or oriel.
See also: cant bay window