BILLET-MOULDING, in architecture, a type of moulding much used in the Norman, Anglo-Norman and early Gothic styles; it consists of a series of small sections of torus (q.v.) or bead-moulding (q.v.) with spaces between them. Frequently, two or three rows of billet-moulding are combined, the projecting por tions of one row directly above or below the flat portions of the next; occasionally the torus or bead will be bent at right angles to connect two such rows. The French term, which is much used in architectural books in English, is baton rompu.