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r enlarge by means of a boring instrument or apparatus; as, to bore a steam cylinder or a gun barrel; to bore a hole. Short but very powerful jaws, by means whereof the insect can bore, as with a centerbit, a cylindrical passage through the most solid wood. T. W. Harris.

One who rows in the forward part of a boat; the bow oar. Bow chaser (Naut.), a gun in the bow for firing while chasing another vessel. Totten. - Bow piece, a piece of ordnance carried at the bow of a ship. -- On the bow (Naut.), on that part of the horizon within 45º on either side of the line ahead. Totten.…

rners, engravers, mathematical instrument makers, etc. Box elder, the ash-leaved maple (Negundo aceroides), of North America. -- Box holly, the butcher's broom (Russus aculeatus). -- Box thorn, a shrub (Lycium barbarum). -- Box tree, the tree variety of the common box.

To fit or furnish with a breech; as, to breech a gun.

The breech mechanism in breech-loading small arms and certain special guns, as automatic and machine guns; --used frequently in referring to the method by which the movable barrels of breech- loading shotguns are locked, unlocked, or rotated to loading position.

discharge. It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.

cabel of a cannon and secured to ringbolts in the ship's side, to limit the recoil of the gun when it is discharged.

A kind of traces with hooks and rings, with which men drag and maneuver guns where horses can not be used.

The piece in the interior of a gun lock, which holds in place the timbler, sear, etc.

ooth or without edges, as for burnishing pivot holes in watches; a reamer. The broach for gun barrels is commonly square and without taper.

A discharge of or from all the guns on one side of a ship, at the same time.

A hard tough alloy of tin, copper, and iron, which can be used for guns.

To give a bright brown color to, as to gun barrels, by forming a thin coat of oxide on their surface. Ure.

The act or operation of giving a brown color, as to gun barrels, etc.

A piece of copper, screwed into a gun, through which the venthole is bored. Farrow.

y tube; or the weight or size of the projectile which a firearm will carry; as, an 8 inch gun, a 12-pounder, a 44 caliber. The caliber of empty tubes. Reid. A battery composed of three guns of small caliber. Prescott.

An early form of hand gun, variety of the arquebus; originally a gun having a regular size of bore. [Obs.] Shak.

non, in which a number of lead or iron balls in layers are inclosed in a case fitting the gun; -- called also canister shot,

elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling. Also, a groove around the base of a cartridge, where the extractor takes hold. --Can"ne*lured (#), a.

A great gun; a piece of ordnance or artillery; a firearm for discharging heavy shot with great force.