cu·pel /kjuˈpɛl, ˈkjupəl/
骨灰所制的坩鍋,試金用灰皿(vt.)用灰皿提煉
Cu·pel n. A shallow porous cup, used in refining precious metals, commonly made of bone ashes (phosphate of lime). [Written also coppel.]
Cupel dust, powder used in purifying metals.
Cu·pel v. t. [imp. & p. p. Cupelled p. pr. & vb. n. Cupelling.] To refine by means of a cupel.
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cupel
n : small porous bowl made of bone ash used in assaying to
separate precious metals from e.g. lead [syn: bone-ash
cup, refractory pot]
[also: cupelling, cupelled]