enarthrosis
/ˌɛnɑːˈθrəʊsɪs
/noun (plural enarthroses /ˌɛnɑːˈθrəʊsiːz/) Anatomy
A ball-and-socket joint.The hip is an enarthrosis (ie, ball and socket) joint.
Origin
Late 16th century: from Greek enarthrōsis, from enarthros 'jointed', from en- 'inside' + arthron 'joint'.