pronation

pro·na·tion

noun \prō-ˈnā-shən\

Definition of PRONATION

: rotation of an anatomical part towards the midline: as a : rotation of the hand and forearm so that the palm faces backwards or downwards b : rotation of the medial bones in the midtarsal region of the foot inward and downward so that in walking the foot tends to come down on its inner margin