The Collaborative International Dictionary of English v.0.48:

Nutcracker \Nut"crack`er\, n.
   1. An instrument for cracking nuts.
      [1913 Webster]

   2. (Zool.)
      (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.
          [1913 Webster]

WordNet (r) 3.0 (2006):

Nucifraga caryocatactes
    n 1: Old World nutcracker [syn: common nutcracker, Nucifraga
         caryocatactes]