\Sco"ri*fy\, v. t. [imp. & p. p. {Scorified}; p. pr. &
vb. n. {Scorifying}.] [Scoria + -fy: cf. F. scorifier.]
(Chem.)
To reduce to scoria or slag; specifically, in assaying, to
fuse so as to separate the gangue and earthy material, with
borax, lead, soda, etc., thus leaving the gold and silver in
a lead button; hence, to separate from, or by means of, a
slag.