Bat. Any part of a brick intentionally or accidentally broken off.
Bed. The horizontal surface on which the bricks of the wall lie in courses. Also, the mortar on which the brick rest.
Bed Joint. A joint between two horizontal courses of brick.
Belt Course. A horizontal course of brick or other material usually projecting, and generally in line with window sills or heads.
Bench-Mark. A well defined mark, accurately established, in a protected location on some immovable object, as a point of reference.
Bond. The overlapping of brick in various ways so as to give both longitudinal and transverse strength to the wall, and at the same time produce a pleasing appearance.
Breaking Joint. The placing of brick so that no two vertical or head joints come immediately over one another.
Buttered Joint. A very thin mortar joint made by scraping a small quantity of mortar with the trowel on all edges of the brick and laying it without the usual mortar bed.
Cell. One of the hollow spaces in building tile.
Centering. The temporary frame or template on which an arch is turned.