In anatomy, articulation describes a joint; the joining or juncture of the bones. This is of three kinds: (1) Diarthrosis, or a movable connection, such as the ball-and-socket joint; (2) Synarthrosis, immovable connection, as by suture, or junction by serrated margins; (3) Symphysis, or union by means of another substance, by a cartilage, tendon, or ligament. Research Articulation