腸ちょう線せんちょうせんMeanings1nouncatgut; sheepgutMedical term for a type of surgical suture material made from the intestines of sheep or other animals. Used in surgical contexts.昔むかしの手しゅ術じゅつでは、腸ちょう線せんが縫ほう合ごう糸しとしてよく使つかわれた。In old surgeries, catgut was often used as suture thread.