ball-and-socket joint

noun

1. 球窝关节；杵臼关节
   a joint such as the hip joint, in which a ball-shaped part moves inside a curved hollow part

1. The ODE currently supports the ball-and-socket, hinge, slider, fixed, angular motor, and hinge-2 ( for vehicle joints) joint types, among others.
   ODE目前可以支持球窝、铰链、滑块、定轴、角电机和hinge-2（用于交通工具的连接）连接类型，以及其他一些连接类型。
2. Cast ball-and-socket joint is used as the column support, while circular hollow section welded joint is used at the top of the tube.
   北京奥运会老山自行车馆的屋顶采用了双层球面网壳结构，柱脚及柱顶分别采用了铸钢球铰支座和圆钢管相贯节点。
3. Worse, he fractured his hip so badly that the ball of the ball-and-socket joint broke off.
   更糟的是，髋部严重骨折，导致股骨头从球窝关节脱出。
4. The hip joint is a ball-and-socket joint.
   髋关节是一种杵臼关节。

noun

1. a joint that can rotate within a socket

2. a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone

   Synonym:    spheroid jointcotyloid jointenarthrodial jointenarthrosisarticulatio spheroidea