shot tower

Century Dictionary and Cyclopedia

1. n. A high round tower in which small shot are made by dropping molten lead from the top. See shot, n., 3.

Wiktionary

1. n. A tall building in which droplets of molten lead fall into a pool of water in order to form lead shot

GNU Webster's 1913

1. n. a lofty tower for making shot, by dropping from its summit melted lead in slender streams. The lead forms spherical drops which cool in the descent, and are received in water or other liquid.
2. n. See under Shot.

WordNet 3.0

1. n. tower of a kind once used to make shot; molten lead was poured through a sieve and dropped into water