knuckle joint
1. a joint allowing movement in one plane only • Syn: hinge joint • Hypernyms: joint 2. a joint of a finger when the fist is closed • Syn: knuckle, metacarpophalangeal joint • Derivationally related forms: knuckle (for: knuckle) • Hypernyms: synovial joint, articulatio synovialis, diarthrosis • Part Holonyms: finger
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