Source : Webster's Revised Unabridged Dictionary (1913)

Mantelpiece \Man"tel*piece`\, n.
   Same as {Mantel}.

Source : WordNet®

mantelpiece
     n : shelf that projects from wall above fireplace; "in England
         they call a mantel a chimneypiece" [syn: {mantel}, {mantle},
          {mantlepiece}, {chimneypiece}]