ball-and-socket joint

汉语翻译

英语解释：

名词 ball-and-socket joint:

1. a freely moving joint in which a sphere on the head of one bone fits into a rounded cavity in the other bone
   同义词：spheroid joint, cotyloid joint, enarthrodial joint, enarthrosis, articulatio spheroidea
2. a joint that can rotate within a socket