supination

[ soo-puh-ney-shuh n ]

/ ˌsu pəˈneɪ ʃən /

rotation of the hand or forearm so that the palmar surface is facing upward (opposed to pronation).

a comparable motion of the foot, consisting of adduction followed by inversion.

the position assumed as the result of this rotation.

Origin of supination

First recorded in 1660–70; supinate + -ion

The elbow is flexed at a right angle, and the forearm supported in a sling midway between pronation and supination.

Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. |Alexander Miles
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).

Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 |Various
When the displaced head of the bone interferes with supination, or with extension, it should be removed.

Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. |Alexander Miles

All movements are painful, but especially movements in the direction of supination.

Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. |Alexander Miles