Anatomy. of, pertaining to, or situated near the side and top of the skull or the parietal bone.
Biology. of or pertaining to parietes or structural walls.
Botany. pertaining to or arising from a wall: usually applied to ovules when they proceed from or are borne on the walls or sides of the ovary.
pertaining to or having authority over residence, and especially visitation regulations between the sexes, within the walls or buildings of a college or university: a listing of the parietal regulations for the law students' dormitory.
Anatomy. any of several parts in the parietal region of the skull, especially the parietal bone.
parietals, Also called parietal rules. campus regulations governing visits between members of opposite sexes to each other's dormitories or rooms.

1590–1600; < Late Latin parietālis of, belonging to walls, equivalent to Latin pariet- (stem of pariēs) wall + -ālis -al1

interparietal, adjective
subparietal, adjective
transparietal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
parietal (pəˈraɪɪtəl)
1.  anatomy, biology of, relating to, or forming the walls or part of the walls of a bodily cavity or similar structure: the parietal bones of the skull
2.  of or relating to the side of the skull
3.  (of plant ovaries) having ovules attached to the walls
4.  (US) living or having authority within a college
5.  a parietal bone
[C16: from Late Latin parietālis, from Latin pariēs wall]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 15c., "pertaining to the walls of a cavity in the body," from L.L. parietalis "of walls," from L. paries (gen. parietis) "wall," of unknown origin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

parietal pa·ri·e·tal (pə-rī'ĭ-tl)

  1. Relating to or forming the wall of any cavity.

  2. Of or relating to either of the parietal bones.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Next came regions governing spatial orientation and language in the parietal
  lobes on the sides of the brain.
Other useful signals came from the inferior parietal lobule, an area of the
  brain known to help guide the movement of limbs.
Then he pointed to the parietal cortex and the temporal lobes, regions that are
  also involved in deliberative decision-making.
Their results suggest that the frontal cortex is responsible for willful
  attention and the parietal cortex for automatic.
Image for parietal
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