cu·pel (kypəl, ky-pĕl)
1. A porous cup, often made of bone ash, used in assaying to separate precious metals from base elements such as lead.
2. The bottom or receptacle in a silver-refining furnace.
tr.v. cu·peled, cu·pel·ing, cu·pels or cu·pelled or cu·pel·ling
To assay or separate from base metals in a cupel.
[French coupelle, from Old French, diminutive of coupe, cup, from Late Latin cuppa, drinking vessel.]
cupel·ler, cupel·er n.
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