Cu"pel (kū"p&ebreve;l), n.
[LL. cupella cup (cf. L. cupella, small cask, dim.
of cupa) : cf. F. coupelle. See Cup, and cf.
Coblet.] 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" (k&usl;*p&ebreve;l"), v. t.
[imp. & p. p. Cupelled (-p?ld");
p. pr. & vb. n. Cupelling.] To
refine by means of a cupel.