tombac

from WordNet (r) 3.0 (2006)

tombac
    n 1: an alloy of copper and zinc (and sometimes arsenic) used to
         imitate gold in cheap jewelry and for gilding [syn:
         {tombac}, {tombak}, {tambac}]

from The Collaborative International Dictionary of English v.0.48

Tombac \Tom"bac\, n. [Pg. tambaca,tambaque, fr. Malay tamb[=a]ga
   copper; cf. Skr. t[=a]mraka; cf. F. tombac.] (Metal.)
   An alloy of copper and zinc, resembling brass, and containing
   about 84 per cent of copper; -- called also {German brass} or
   {Dutch brass}. It is very malleable and ductile, and when
   beaten into thin leaves is sometimes called {Dutch metal}.
   The addition of arsenic makes {white tombac}. [Written also
   {tombak}, and {tambac}.]
   [1913 Webster]