Definition from Wiktionary, the free dictionary
supination (plural supinations)
- The act or state of lying face upward, on one's back.
- (anatomy) The act of rotating the forearm so that the palm of the hand is turned up or forward, or the resulting state of the forearm
- (anatomy) The act or state of combined adduction and inversion of the foot.
- (fencing) The position of the sword hand when the palm is facing up.