ball-and-socket joint spheroid joint cotyloid joint enarthrodial joint enarthrosis articulatio spheroidea
ball-and-socket_joint%1:08:00:: spheroid_joint%1:08:00:: cotyloid_joint%1:08:00:: enarthrodial_joint%1:08:00:: enarthrosis%1:08:00:: articulatio_spheroidea%1:08:00::
a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone