PRONA'TION, noun [from Latin pronus, having the face downwards.] 1. Among anatomists, that motion of the radius whereby the palm of the hand is turned downwards; the act of turning the palm downwards; opposed to supination. 2. That position of the hand, when the thumb is turned towards the body, and the palm downwards.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI