from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. 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 Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The assaying of precious metal in a cupel.

from the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

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


From cupel + -ation. (Wiktionary)



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  • assaying for metal in a small, flat vessel

    February 7, 2007