Socket joint

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A synovial joint in which the ball-shaped surface of one bone fits into the rounded cavity of the other, allowing movement in almost any direction (in a 360o angle).


Examples of this form of articulation are found in the arm, hip and shoulder providing swing for arms and legs in various directions.


  • enarthrosis
  • spheroid or spheroidal joint
  • spheroid articulation
  • articulatio spheroidea
  • articulatio cotylica
  • cotyloid joint
  • enarthrodial joint
  • ball-and-socket joint