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ball'-and-sock'et joint"



Pronunciation: (bôl'un sok'it), [key]
1. Also called enarthrosis. Anat., Zool.a joint in which the rounded end of one bone fits into a cuplike end of the other bone, allowing for relatively free rotary motion, as at the hip or shoulder.
2. Also called ball joint. a similar joint between rods, links, pipes, etc., consisting of a ball-like termination on one part held within a concave, spherical socket on the other.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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