1. From the Latin "parietalis" meaning "belonging to the wall" which the ancient anatomists used to designate the wall, as of a body cavity. Here are some examples:

• Parietal bone: the main side bone of the skull.
• Parietal lobe: the main side lobe of the brain (it is beneath the parietal bone).
• Parietal pericardium: the outer membrane around the heart.
• Parietal peritoneum: the membrane lining the abdominal cavity (as opposed to the visceral peritoneum that envelops the abdominal organs).

2. Pertaining to, or situated near the side and top of the skull: In his medical book, Sam scrutinized the parietal bone that was pictured in detail.
3. Pertaining to or arising from a wall: Parietal ovaries are those that usually proceed from or are borne on the walls or sides of the ovary.
4. A reference to an authority over residence, especially visitation regulations between the sexes, within the walls or buildings of a college or university; campus regulations governing visits between members of opposite sexes to each other's dormitories or rooms; such as, a listing of the parietal regulations for the law students' dormitory.

Engravings and paintings on cave walls and a few open sites; cave art Parietal art has been found mostly in France and northern Spain, with a few Italian sites, and perhaps others even more distant.