Wishbone

noun

1. A forked bone between the neck and breast of a bird consisting chiefly of the two clavicles fused at their median or lower end, regarded as a lucky charm in some countries.
2. A spar in two parts, between which a sail is hoisted, the wishbone extending its clew.
3. Any sailing vessel rigged with a wishbone.
4. A particular kind of offensive formation. See wishbone formation.