Cupel

[kju:pәl]

解释:

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

(v. t.) To refine by means of a cupel.

校对:齐利格

解释:

n. a small vessel used by goldsmiths in assaying precious metals.—v.t. to assay in a cupel.—n. Cupellā′tion the process of assaying precious metals.

整理:华莱士