from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A refining process for nonoxidizing metals, such as silver and gold, in which a metallic mixture is oxidized at high temperatures and base metals are separated by absorption into the walls of a cupel.

from The Century Dictionary.

  • noun Separation of gold and silver from lead by treatment in a cupeling-furnace or in a cupel.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act or process of refining gold or silver, etc., in a cupel.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The assaying of precious metal in a cupel.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From cupel + -ation.


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  • assaying for metal in a small, flat vessel

    February 7, 2007