PARIETAL

I. adjective Etymology: Middle English, from Medieval Latin ~is, from pariet-, paries wall of a cavity or hollow organ, from Latin, wall Date: 15th century 1. of or relating to the walls of a part or cavity, of, relating to, or forming the upper posterior wall of the head, attached to the main wall rather than the axis or a cross wall of a plant ovary, of or relating to college living or its regulation, II. noun Date: 15th century a ~ part (as a bone, scale, or plate), the regulations governing the visiting privileges of members of the opposite sex in campus dormitories