拮きっ抗こう筋きん

noun

antagonist muscle; antagonistic muscle

Anatomical term for a muscle that opposes the action of another muscle (the agonist).

• 上じょう腕わん二に頭とう筋きんと上じょう腕わん三さん頭とう筋きんは互たがいに拮きっ抗こう筋きんの関かん係けいにある。

  The biceps brachii and triceps brachii are antagonist muscles to each other.