Source : Webster's Revised Unabridged Dictionary (1913)

Wishbone \Wish"bone`\, n.
   The forked bone in front of the breastbone in birds; --
   called also {merrythought}, and {wishing bone}. See
   {Merrythought}, and {Furculum}.

Source : WordNet®

wishbone
     n : the furcula of a domestic fowl [syn: {wishing bone}]