The Collaborative International Dictionary
Dispart \Dis*part"\, n.
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(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. (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.
Usage examples of "dispart sight".
The black mass of a boat appeared in the V of the dispart sight, and he waved his hand to Bush.
The long brass gun in the broad bow-port could be trained very far forward, and presently Bonden had the target full over his dispart sight.