Source : Webster's Revised Unabridged Dictionary (1913)

Ormolu \Or`mo*lu"\, n. [F. or moulu; or gold (L. aurum) + moulu,
   p. p. of moudre to grind, to mill, L. molere. See {Aureate},
   and {Mill}.]
   A variety of brass made to resemble gold by the use of less
   zinc and more copper in its composition than ordinary brass
   contains. Its golden color is often heightened by means of
   lacquer of some sort, or by use of acids. Called also {mosaic
   gold}.

   {Ormolu varnish}, a varnish applied to metals, as brass, to
      give the appearance of gold.