Just then, with a roar and a whistle, a round-shot passed high above the roof of the log-house and plumped far beyond us in the wood. Treasure Island (1883), Robert Louis Stevenson.
a solid usually iron spherical projectile fired from a smoothbore cannon
الواصلة
a sol·id u·su·al·ly i·ron sphe·ri·cal pro·jec·tile fired from a smooth·bore Can·non