Diarthrosis

{di-ar-thro’ -sis) [did, throughout; dpSpcjaig, articulation]. A form of articulation characterized by mobility. The various forms are: Arthrodia, in which the bones glide upon plane surfaces; Enarthrosis, ball-and-socket joint, with motion in all directions; Ginglymus, or hinge-joint, with backward and forward motion; and D. rotator i a, with pivotal movement. 227