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Medical Definition of Ellipsoidal joint
1. A modified ball-and-socket synovial joint in which the joint surfaces are elongated or ellipsoidal; it is a biaxial joint, i.e., two axes of motion at right angles to each other, the radiocarpal being an example. Synonym: articulatio ellipsoidea, articulatio condylaris, condylar articulation, condylar joint. (05 Mar 2000)