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wishbone

American  
[wish-bohn] / ˈwɪʃˌboʊn /

noun

  1. a forked bone, formed by the fusion of the two clavicles, in front of the breastbone in most birds; furcula.

  2. Football. an offensive formation in which the fullback is positioned directly behind the quarterback and the two halfbacks are positioned farther behind and to the left and right, respectively.


wishbone British  
/ ˈwɪʃˌbəʊn /

noun

  1. the V-shaped bone above the breastbone in most birds consisting of the fused clavicles; furcula

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

wishbone Scientific  
/ wĭshbōn′ /
  1. The forked bone in front of the breastbone in most birds, consisting of the two collarbones partly fused together. It serves as a spring, capturing some of the energy during the downward stroke of the wings for release on the upward stroke.


Etymology

Origin of wishbone

1850–55, wish + bone; so called from the custom of pulling the furcula of a cooked fowl apart until it breaks, the person holding the longer (sometimes shorter) piece being granted a wish