In terms of aiming at a target, accuracy is the ability to hit what you're aiming at (or at least come close). Precision is the ability to duplicate the efforts. Those who can throw a single coin and hit Peter's boots are accurate. If they can hit his boots with several coins, they're precise and accurate. If they throw several coins at his boots, but consistently hit his stomach, they're precise but not accurate.
See this chart to clarify.
However, in lay terms, many people use these (erroneously) interchangeably.