knuckle joint

Definitions of knuckle joint
  1. noun
    a joint of a finger when the fist is closed
    synonyms: knuckle, metacarpophalangeal joint
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    type of:
    articulatio synovialis, diarthrosis, synovial joint
    a joint so articulated as to move freely
  2. noun
    a joint allowing movement in one plane only
    synonyms: hinge joint
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    type of:
    joint
    junction by which parts or objects are joined together
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