rac·quet·ball
noun/ˈrækɪtbɔːl/
/ˈrækɪtbɔːl/
[uncountable]- a game played especially in the US by two or four players on a court with four walls, using rackets and a small hollow rubber ball
美式墙网球（二人或四人对垒，场地四面有墙，使用球拍和空心小橡皮球）