pa·ri·e·tal 
(pə-rīĭ-təl)
(pə-rīĭ-təl)adj.
1. Relating to or forming the wall of a body part, organ, or cavity.
2. Of or relating to either of the parietal bones.
3. Botany Borne on the inside of the ovary wall. Used of the ovules or placentas in flowering plants.
4. Dwelling within or having authority within the walls or buildings of a college.
n.
1. A parietal part, such as a wall or bone.
2. parietals The rules governing the visiting privileges of members of the opposite sex in college or university dormitories.
[Middle English, from Late Latin parietālis, of a wall, from Latin pariēs, pariet-, wall.]