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cupel

[kyoo-puh l, kyoo-pel] /ˈkyu pəl, kyuˈpɛl/
noun
1.
a small, cuplike, porous container, usually made of bone ash, used in assaying, as for separating gold and silver from lead.
2.
a receptacle or furnace bottom in which silver is refined.
verb (used with object), cupeled, cupeling or (especially British) cupelled, cupelling.
3.
to heat or refine in a cupel.
Origin
1595-1605
1595-1605; < Medieval Latin cūpella, equivalent to Latin cūp(a) tub + -ella diminutive suffix
Related forms
cupeler
[kyoo-puh-ler] /ˈkyu pə lər/ (Show IPA),
cupeller
[kyoo-pel-er] /kyuˈpɛl ər/ (Show IPA),
noun
cupellation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for cupellation

cupel

/ˈkjuːpəl; kjʊˈpɛl/
noun
1.
a refractory pot in which gold or silver is refined
2.
a small porous bowl made of bone ash in which gold and silver are recovered from a lead button during assaying
verb -pels, -pelling, -pelled (US) -pels, -peling, -peled
3.
(transitive) to refine (gold or silver) by means of cupellation
Derived Forms
cupeller, noun
Word Origin
C17: from French coupelle, diminutive of coupecup

cupellation

/ˌkjuːpɪˈleɪʃən/
noun
1.
the process of recovering precious metals from lead by melting the alloy in a cupel and oxidizing the lead by means of an air blast
2.
the manufacture of lead oxide by melting and oxidizing lead
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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