stamp mill

noun Mining.
a mill or machine in which ore is crushed to powder by means of heavy stamps or pestles.
Also, stamping mill.


Origin:
1740–50

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
stamp mill
 
n
metallurgy a machine for crushing ore

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
It contains a five-stamp mill and other equipment used to pulverize ore and recover gold.
It has been said that when the last stamp mill ceased operating, the town was so quiet that people could not sleep.
However, one company planned to erect a stamp mill to crush the petrified wood into industrial abrasives.
In nature's stamp mill they had been polished down until they represented a type.
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