pronation /prōnā″shən/ [L, pronare, to bend forward] , 1. assumption of a prone position, one in which the ventral surface of the body faces downward. 2. (of the arm) the rotation of the forearm so that the palm of the hand faces downward or backward. 3. (of the foot) the lowering of the medial edge of the foot by turning it outward and through abduction in the tarsal and metatarsal joints. −pronate, v.
