Wiktionary
ball-and-socket joints
n. (ball-and-socket joint English)
Usage examples of "ball-and-socket joints".
The ball-and-socket joints in its shoulders and wrists had been freed up so that the gibbon could hang from its arms and twist its body through a full circle.
He rotated his body around on the ball-and-socket joints of the arms until his base was pointed straight down.
Employing the sharper of their appendages, they made deep cuts through the tops of the shoulder muscles, clear down to the bones that formed part of the ball-and-socket joints.
Inside those roughly spheroidal torsos must be skeletons arranged on a plan of intersecting hoops, with ball-and-socket joints for the five limbs.