Толковый словарь английского языка - caliber

or calibre noun Etymology: Middle French calibre, from Old Italian calibro, from Arabic qālib shoemaker's last Date: 1567 1. degree of mental capacity or moral quality, degree of excellence or importance, 2. the diameter of a bullet or other projectile, the diameter of a bore of a gun usually expressed in hundredths or thousandths of an inch and typically written as a decimal fraction , the diameter of a round or cylindrical body