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knuckle joint

noun
1.
a joint forming a knuckle.
2.
Machinery. a joint between two parts allowing movement in one plane only.
Origin
1860-1865
1860-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for knuckle joint

knuckle joint

noun
1.
any of the joints of the fingers
2.
(mechanical engineering) a hinged joint between two rods, often a ball and socket joint
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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