柯林斯词典catheter /ˈkæθɪtə/ (catheters) 1. N-COUNT A catheter is a tube which is used to introduce liquids into a human body or to withdraw liquids from it. 導琯[毉學] 返回 catheter剑桥词典a long , very thin tube used to take liquids out of the body 導（液）琯 返回 catheter