Muz·zle n.
 1. The projecting mouth and nose of a quadruped, as of a horse; a snout.
 2. The mouth of a thing; the end for entrance or discharge; as, the muzzle of a gun.
 3. A fastening or covering (as a band or cage) for the mouth of an animal, to prevent eating or vicious biting.
    With golden muzzles all their mouths were bound   --Dryden.
 Muzzle sight. Gun. See Dispart, n., 2.


 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.