大だい胸きょう筋きん

noun

pectoralis major muscle

Anatomical term for the large chest muscle. Used in medical, fitness, and bodybuilding contexts.

• ベンチプレスは大だい胸きょう筋きんを鍛きたえる代だい表ひょう的てきな種しゅ目もくだ。

  The bench press is a classic exercise for training the pectoralis major muscle.

• 大だい胸きょう筋きんは鎖さ骨こつ部ぶと胸むね肋あばら部ぶに分わけられる。

  The pectoralis major muscle is divided into the clavicular and sternocostal parts.