ARTHRODIA,in Anatomy, a Species of Articulation, wherein a flat Head of one Bone is received into a shallow Socket of another. See BONE and ARTICULATION. Such is that of the Humerus with the Scapula. See HUMERUS, &c. ; The Word is formed from the Greek ἄρθρον, Articulus, and δέχομαι, recipio, I receive.