parietal

adj

1. Of or relating to the wall of a body part, organ or cavity.

   “Hydrochloric acid is secreted by the parietal cells of the gastric glands, located on the wall of the fundus of the stomach.”

   “The superior aspect of the supramarginal gyrus lies underneath the euryon, which corresponds to the most prominent point of the parietal tuberosity or bossa […]”

2. Of or relating to the parietal bones.
3. Of or relating to college living and, especially, its regulation.

   “At Harvard College, the officers resident within the college walls constitute a permanent standing committee, called the Parietal Committee.”

4. Attached to the main wall of the ovary, and not to the axis; said of a placenta.

noun

1. Either of the two parietal bones, on the top and side of the skull.
2. Any of the scales of a snake that are located on the head and connected to the frontals towards the posterior.
3. A flat Roman wall tile with roughened surface, used as a base for plasterwork.
4. (informal)Dormitory rules governing visits from members of the opposite sex.