shot tower

shot tower

noun
a tower from the top of which finely divided streams of molten lead are dropped down a central well, breaking up into spherical drops during their fall to be quenched and hardened in a tank of water at the bottom.

Origin:
1810–20

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
shot tower
 
n
a building formerly used in the production of shot, in which molten lead was graded and dropped from a great height into water, thus cooling it and forming the shot

Collins English Dictionary - Complete & Unabridged 10th Edition
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