Illustration of ball-and-socket joint

- ball-and-socket joint 1
单词 | ball-and-socket joint |
释义 | ball-and-socket jointnoun ball-and-sock·et joint ˈbȯl-ən(d)-ˈsä-kət- 1 : a joint in which a ball moves within a socket so as to allow rotary motion in every direction within certain limits 2 : an articulation (such as the hip joint) in which the rounded head of one bone fits into a cuplike cavity of the other and admits movement in any direction |
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