The Collaborative International Dictionary of English v.0.48:

Bric-a brac \Bric"-a brac`\, n. [F.]
   Miscellaneous curiosities and works of decorative art,
   considered collectively.
   [1913 Webster]

   A piece of bric-a-brac, any curious or antique article of
      virtu, as a piece of antiquated furniture or metal work,
      or an odd knickknack.
      [1913 Webster]