parietal
adjective
pa·ri·e·tal
| \ pə-ˈrī-ə-tᵊl
\
\
Definition of parietal
(Entry 1 of 2)
1a
: of or relating to the walls of a part or cavity
b
: of, relating to, or located near or within the parietal bone or parietal lobe of the head
2
: attached to the main wall rather than the axis or a cross wall of a plant ovary
—used of an ovule or a placenta
3
dated
: of or relating to college living or its regulation
especially
: of or relating to parietals (see parietal entry 2 sense 2)
All of this takes place in a residential environment no longer constrained by the parietal hours that the older set of today's parents will recall. One of the signature changes in the student revolt of the late sixties/early seventies was the end not only of curfew hours for residence halls but also of housing separated by sex. — Barrett Seaman