catgut
/ˈkætgʌt/noun
mass noun
- a material used for the strings of musical instruments and for surgical sutures, made of the dried twisted intestines of sheep or horses, but not cats肠线（羊或马, 而非猫的干缩曲肠所作成的线, 用作器乐弦和手术缝合线）。
词源
late 16th cent.: the association with CAT1 remains unexplained.