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3 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Cal·i·ber, Cal·ibre  n.
 1. Gunnery The diameter of the bore, as a cannon or other firearm, or of any 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.
 Note:The caliber of firearms is expressed in various ways. Cannon are often designated by the weight of a solid spherical shot that will fit the bore; as, a 12-pounder; pieces of ordnance that project shell or hollow shot are designated by the diameter of their bore; as, a 12 inch mortar or a 14 inch shell gun; small arms are designated by hundredths of an inch expressed decimally; as, a rifle of .44 inch caliber.
 2. The diameter of round or cylindrical body, as of a bullet or column.
 3. Fig.: Capacity or compass of mind.
 Caliber compasses. See Calipers.
 Caliber rule, a gunner's calipers, an instrument having two scales arranged to determine a ball's weight from its diameter, and conversely.
 A ship's caliber, the weight of her armament.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Cal·i·pers n. pl.  An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses.
 Caliper square, a draughtsman's or mechanic's square, having a graduated bar and adjustable jaw or jaws. --Knight.
 Vernier calipers. See Vernier.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Com·pass·es n., pl. An instrument for describing circles, measuring figures, etc., consisting of two, or (rarely) more, pointed branches, or legs, usually joined at the top by a rivet on which they move.
 Note:The compasses for drawing circles have adjustable pen points, pencil points, etc.; those used for measuring without adjustable points are generally called dividers. See Dividers.
 Bow compasses. See Bow-compass.
 Caliber compasses, Caliper compasses. See Calipers.
 Proportional, Triangular, etc., compasses. See under Proportional, etc.