base bullion

American  

noun

Metallurgy.

1. smelted lead containing impurities, as gold, silver, or zinc, that are later removed.

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Example Sentences

Alloyed with inferior metal; debased; as, base coin; base bullion.

From Project Gutenberg

The ingot was handed round, and all the clerks saw that indeed it was base bullion. 

From Project Gutenberg

According to the testimony of the clerk himself who wrote this certificate, this Mongol sold to him a youen-pao weighing fifty ounces; this youen-pao of base bullion weighs fifty-two ounces; this, therefore, cannot be the Mongol’s youen-pao; but now comes the question, whose is it? 

From Project Gutenberg

It was obvious that the ingot was base bullion, and on the face of the affair there was clear proof that the Tartar had sold it. 

From Project Gutenberg

All the silver mined in the United States is smelted and refined by domestic plants; and in addition much of the Canadian, Mexican, and South and Central American silver is exported to the United States as ore and base bullion, to be treated in this country.

From Project Gutenberg