|dī+ noun
( plural diarthroses )
Etymology: New Latin, from Greek diarthrōsis, from diarthroun to joint, articulate (from dia- + arthroun to fasten by a joint, from arthron joint) + -sis — more at arthr-
: a form of articulation that permits considerable change in position and spatial relationship between the articulated parts : a freely movable joint (as the arthrodia, the ginglymus, the pivot joint, the condyloid joint, the enarthrosis)