Source : Webster's Revised Unabridged Dictionary (1913)

Nutcracker \Nut"crack`er\, n.
   1. An instrument for cracking nuts.

   2. (Zo["o]l.)
      (a) A European bird ({Nucifraga caryocatactes}), allied to
          the magpie and crow. Its color is dark brown, spotted
          with white. It feeds on nuts, seeds, and insects.
      (b) The American, or Clarke's, nutcracker ({Picicorvus
          Columbianus}) of Western North America.

Source : WordNet®

nutcracker
     n 1: a compound lever used to crack nuts open [syn: {nutcrackers}]
     2: any of various small short-tailed sharp-beaked birds that
        creep on trees and feed on small nuts and insects [syn: {nuthatch}]
     3: speckled birds that feed on nuts