'coarse metal' definitions:

Definition of 'coarse metal'

From: GCIDE
  • Matte \Matte\ (m[a^]t), n. [F. matte; cf. F. mat, masc., matte, fem., faint, dull, dim; -- said of metals. See Mate checkmate.]
  • 1. (Metallurgy) A partly reduced copper sulphide, obtained by alternately roasting and melting copper ore in separating the metal from associated iron ores, and called {coarse metal}, fine metal, etc., according to the grade of fineness. On the exterior it is dark brown or black, but on a fresh surface is yellow or bronzy in color. [1913 Webster]
  • 2. A dead or dull finish, as in gilding where the gold leaf is not burnished, or in painting where the surface is purposely deprived of gloss. [1913 Webster]