articular

adj. pertaining to the joints

The articular bone is in the lower jaw of most tetrapods, including amphibians, sauropsids ("reptiles"), birds and early synapsids. In these animals it is connected to two other lower jaw bones, the suprangular and the angular; and it forms the jaw joint by articulating with the quadrate bone of the skull.
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Articular /ar·tic·u·lar/ pertaining to a joint. ar·tic·u·lar adj. Of or relating to a joint or joints. articular pertaining to a joint. [more]Articular - Community and Resources

Adjective
1. relating to or affecting the joints of the body; "the articular surfaces of bones"; "articular disease"
(synonym) articulary
(pertainym) joint, articulation, articulatio

v. articulate; joint; frame

adj. articular; especial