noun

• 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.
• (nautical) A spar in two parts, between which a sail is hoisted, the wishbone extending its clew.
• (nautical) Any sailing vessel rigged with a wishbone.
• (American football) A particular kind of offensive formation. See wishbone formation.
• (automotive) A suspension component similar in shape to a chicken wishbone.