from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cannonball.
from The Century Dictionary and Cyclopedia
- n. A stone used for the shot of a catapult or cannon. Before the invention of iron balls, stones were commonly used as projectiles.
- n. A flint prepared for insertion in the lock of a gun. See flint-lock.
gun + stone: they were originally made from stone. (Wiktionary)