1. Plural of cupeller; persons or devices that perform cupellation, a metallurgical process of refining precious metals by heating them in a cupel (a small cup-shaped vessel).
Usage: technical; metallurgy

Examples

• The cupellers at the mint carefully refined the gold using traditional heating methods.
• Medieval cupellers developed techniques to separate pure silver from base metals.
• Modern cupellers employ automated equipment to ensure consistent metal purity.
• The workshop employed skilled cupellers who understood the precise temperatures needed for refining.
• Historical records describe cupellers as essential craftspeople in precious metal production.