Definitions

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

  • n. A porous cup, often made of bone ash, used in assaying to separate precious metals from base elements such as lead.
  • n. The bottom or receptacle in a silver-refining furnace.
  • transitive v. To assay or separate from base metals in a cupel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A small circular receptacle used in assaying gold or silver with lead.
  • v. To refine by means of a cupel.

from the GNU version of the Collaborative International Dictionary of English

  • n. A shallow porous cup, used in refining precious metals, commonly made of bone ashes (phosphate of lime).
  • transitive v. To refine by means of a cupel.

from The Century Dictionary and Cyclopedia

  • To perform the process of cupellation upon.
  • n. In metallurgy, a small vessel made of pulverized bone-earth, in the form of a frustum of a cone, with a cavity in the larger end, in which lead containing gold and silver is cupeled. See cupellation.
  • n. The hearth of a cupellation furnace in which silver is separated from lead; a test. See test, 2.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead

Etymologies

French coupelle, from Old French, diminutive of coupe, cup, from Late Latin cuppa, drinking vessel.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French coupelle, mediaeval Latin cupella, diminutive of cupa ‘cask’. (Wiktionary)

Examples

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  • Silver assays will be adjusted for slag and cupel losses.

    - contract for refining of lead and silver ore.

    January 22, 2009