(dis·pärt′) v.t. & v.i.
To divide; separate into pieces or parts. [<Ital. dispartire <L dis- away + partire divide <pars, partis a part, share]

(dis·pärt′) noun Mil.
1. The difference between the semidiameters of the base ring and the muzzle of a cannon.
2. A piece upon the top of a cannon's muzzle to raise the line of sight parallel with the axis of the bore; a muzzle sight: also dis·part′-sight′. [Origin uncertain]