Examples from the Web for supination
The elbow is flexed at a right angle, and the forearm supported in a sling midway between pronation and supination.
The wrist has also forward and backward movements, either in pronation, in supination, or the normal state.Delsarte System of Oratory|Various
Those defending the upper left-hand quarter are “quarte” (fourth; in supination) and “quinte” (fifth; in pronation).
When the displaced head of the bone interferes with supination, or with extension, it should be removed.
All movements are painful, but especially movements in the direction of supination.