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CUPEL
- to refine gold or silver in a cuplike vessel [v CUPELED, CUPELING, CUPELLED, CUPELLING, CUPELS]
- to refine gold or silver in a small vessel [v CUPELED or CUPELLED, CUPELLING or CUPELING, CUPELS]
- a small shallow porous cup especially of bone ash used in assaying to separate precious metals from lead
- small, cuplike, porous container, usually made of bone ash, used in assaying, as for separating gold and silver from lead
- receptacle or furnace bottom in which silver is refined
- to heat or refine in a cupel