\Pro*na"tion\, n. [Cf. F. pronation.] (Physiol.)
(a) The act of turning the palm or palmar surface of the
    forefoot downward.
(b) That motion of the forearm whereby the palm or palmar,
    surface is turned downward.
(c) The position of the limb resulting from the act of
    pronation. Opposed to {supination}.