cannon ball

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternate (dated) spelling of cannonball.
• noun military, artillery A solid usually iron spherical projectile fired from a smoothbore cannon; a solid shot; a round shot.
• noun military, artillery An explosive-filled hollow iron sphere fuzed through a hole and designed to explode at a calculated distance rather than explode on impact.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a solid projectile that in former times was fired from a cannon