Pronunciation: (kyOO'pul, kyOO-pel'), [key]
—n., v., -peled, -pel•ing or (esp. Brit.) -pelled, -pel•ling.
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.
to heat or refine in a cupel.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.