catgut

n [U] thin strong cord made from the dried intestines of animals and used for the strings of violins, tennis rackets, etc （小提琴、 网球拍等用的）肠线.

catcher, catching, catchment area, catchpenny, catchphrase, catchword, catchy, catechism, catechize, catechise, categorical, categorically, categorize, categorize, -ise, category, cater, caterer, catering, caterpillar, caterwaul, catfish, Cath, catharsis, cathartic, cathedral, Catherine wheel, catheter, catheterize, -ise, cathode, cathode ray, Catholic, Catholicism, catholicity, catkin, catmint, catnap, catnip, cats-paw, catsuit, catsup, cattily,