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| ball and sock·et joint (plural ball and sock·et joints) or ball joint (plural ball joints) |
noun |
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| Definition: |
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1. joint like hip joint: a joint such as the hip joint in which a bone with a rounded end fits into a concave area of the adjoining bone, allowing a wide range of movement
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2. junction between moving parts: a junction between two moving parts of a mechanism in which the rounded end of one part fits into a cup-shaped socket on the other
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