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/suÂ·piÂ·naÂ·tion/ (sooâ³pÄ­-naÂ´shun) [L. supinatio ] the act of assuming the supine position, or the state of being supine. Applied to the hand, the act of turning the palm forward (anteriorly) or upward, performed by lateral rotation of the forearm. Applied to the foot, it generally implies movements resulting in raising of the medial margin of the foot, hence of the longitudinal arch.
supination of the forearm is to rotate from the position of palm down, to palm facing up. While pronation of the forearm is the opposite coming from palm facing up to palm f â¦ acing down. 2 people found this useful.