The twelve-pound cannon is a cannon that fires twelve-pound projectiles from its barrel, as well as grapeshot, chainshot, shrapnel, and later shells and canister shot.
Meriam dua belas pon adalah sebuah meriam yang menembakkan proyektil dua belas pon dari larasnya, serta grapeshot, chain-shot, shrapnel, dan kemudian selongsong dan canister shot.