叉さ骨こつ

noun

furcula; wishbone

Anatomical term for the forked bone found in birds and some other animals; commonly called the wishbone.

• 鳥とりの叉さ骨こつは、左さ右ゆうの鎖さ骨こつが癒ゆ合ごうしてできている。

  The bird's furcula is formed by the fusion of the left and right clavicles.