horizontal projecting molding or band on the face of a wall
Horizontal moulding usually made from a series of complex profiles. 
a horizontal band of moulding projecting from a wall
a shallow moulding continued across a whole facade which may be defined by its position eg cill or impost course. (Illustration) (Illustration in context) 
A band of stone or brick which projects from the face of a wall. String courses may be stepped up and down. They may be plain or moulded. They can be purely decorative, but can also help to shed water from the face of the wall.
Horizontal course or moulding projecting from the surface of a wall.
Also called a belt course. A horizontal band of decorative masonry extending across the face of a building or around features such as columns and pilasters.; 
Horizontal course or moulding projecting from the surface of a wall.
Horizontal band of masonry wrapping around entire facade of building
In architecture a string course is a horizontal band in a building, forming a part of the design, whether moulded, projecting, or carved, or in any way distinguished from the rest of the work.
A continuous horizontal band of masonry set within the surface of a wall. When used stucturally it is intended to provide a stable foundation for inferior masonry (such as rubble work) to be built upon. It is also often used for exclusively decorative effect, especially by projecting from the wall face and being embellished with ornament.
A projecting band or moulding set horizontally in a wall.Projecting horizontal length of masonry.