広こう背はい筋きん

noun

latissimus dorsi muscle

Anatomical term for the large, flat back muscle that extends from the lower spine to the upper arm.

• 広こう背はい筋きんは背せ中なかの大おおきな筋きん肉にくで、腕うでを引ひく動どう作さに使つかわれる。

  The latissimus dorsi is a large muscle in the back, used for pulling movements of the arm.