Dis‐part″, n. 1. (Gun.) The difference between the thickness of the metal at the mouth and at the breech of a piece of ordnance.
On account of the dispart, the line of aim or line of metal, which is in a plane passing through the axis of the gun, always makes a small angle with the axis. Eng. Cys.
2. (Gun.) A piece of metal placed on the muzzle, or near the trunnions, on the top of a piece of ordnance, to make the line of sight parallel to the axis of the bore; — called also dispart sight, and muzzle sight.