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cupel
From The Collaborative International Dictionary of English v.0.48:
Cupel \Cu"pel\ (k[=u]"p[e^]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.] [1913 Webster] Cupel dust, powder used in purifying metals. [1913 Webster] .
From The Collaborative International Dictionary of English v.0.48:
Cupel \Cu*pel"\ (k[-u]*p[e^]l"), v. t. [imp. & p. p. Cupelled (-p?ld"); p. pr. & vb. n. Cupelling.] To refine by means of a cupel. [1913 Webster]
