A specific articulation permitting more or less free movement; a bone articulation that permits free movement in a joint. Structurally, it is a synovial joint.
A freely movable joint. The ends of the adjoining bones are covered with a thin cartilaginous sheet, and the bones are linked by a ligament (capsule) lined with synovial membrane, which secretes synovial fluid. Such joints are classified according to the type of connection between the bones and the type of movement allowed.
An articulation in which opposing bones move freely (e.g., a hinge joint or a pivot joint).