Chamfer.

Chamfer. In Architecture, an angle which is slightly pared off is said to be chamfered; a large chamfer, as in a wall at the window opening, is called a splay. The chamfer is sometimes made slightly concave, in which case it is called a hollow chamfer. Chamfers, in Gothic architecture, have frequently ornamental terminations of various kinds. The term chamfer is applied to wood-work as well as stone.