CORBEL, or Corbil, is also used, in building, for a short piece of timber placed in a wall, with its end sticking out six or eight inches, as occasion serves, in manner of a shouldering-piece. The under part of the end thus sticking out is sometimes cut into the form of a boulton; sometimes of an ogee, and sometimes of a face, &c. according to the workman's fancy; the upper side being plain and flat.