Cupel /(kū"pĕl)/

Cu·pel

Cupel

n.
  1. A shallow porous cup, used in refining precious metals, commonly made of bone ashes (phosphate of lime).

Phrases & Compounds
Cupel dust
powder used in purifying metals.

Cupel

v. t.

imp. & p. p. Cupelled; p. pr. & vb. n. Cupelling

  1. To refine by means of a cupel.