尺しゃっ骨こつ

noun

ulna

Anatomical term for the inner and larger bone of the forearm, on the side opposite the thumb.

• 尺しゃっ骨こつは前ぜん腕わんの二に本ほんの骨ほねのうち、小こ指ゆび側がわにある太ふとい方ほうの骨ほねです。

  The ulna is the thicker of the two bones in the forearm, located on the little-finger side.