Definition of parietal in US English:

parietal

adjective

  • 1Biology Anatomy
    Of, relating to, attached to, or denoting the wall of the body or of a body cavity or hollow structure.

    • ‘The frontals are fused medially and enclose the parietal foramen and anterior sagittal crest.’
    • ‘Metastases were present in the vertebral bodies, spleen, peritoneum, pleura, adrenal glands, visceral and parietal pericardium, and multiple lymph nodes.’
    • ‘A large tumor was found that originated from the parietal pleura at the dorsal site.’
    • ‘Superficial tenderness can arise from the skin, the subcutaneous tissues, the muscle or fascia of the abdominal wall, the anterior parietal peritoneum, or a very tender organ that lies next to the anterior abdominal wall.’
    • ‘In the derived condition, the parietal is discontinuous around the lateral margin of the parietal fenestra with the squamosal forming part of this margin.’
    1. 1.1 Of the parietal lobe.
      ‘the parietal cortex’
      • ‘Both research teams found that low- and high-capacity subjects differed in levels of brain activity in the parietal cortex, a region of the brain known to be involved in the processing of visual and spatial information.’
      • ‘She skillfully uses patients suffering from neglect due to parietal lesions to explore a number of central questions in the study of spatial representations.’
      • ‘The posterior parietal cortex then sorts out bodily movements corresponding to the observed actions.’
      • ‘That said, it is interesting to note that a recent autopsy examination of Einstein's preserved brain did uncover extra tissue in the parietal cortex, which mediates spatial cognition.’
      • ‘Zapping the parietal cortex at the right moment with TMS can block processing downstream in the visual cortex.’
  • 2North American Relating to residence in a college or university dormitory and especially to visits from members of the opposite sex.

    ‘parietal rules’
  • 3Archaeology
    Denoting prehistoric art found on rock walls.

    • ‘It seems likely, therefore, that Archaic hunter-gatherers were the first to produce parietal art in southeastern caves and that its production may have related to economic activities like mining.’

noun

  • 1Zoology Anatomy
    A parietal structure.

    • ‘Two additional, albeit smaller, processes are present along the posterior emargination of the parietal.’
    • ‘All species have two chloroplasts, one parietal in each of the two main plates.’
    1. 1.1
      short for parietal bone
      • ‘Together with the quadrates, the opisthotics and various dermal bones, such as the parietals and the squamosals, the bones of the occiput form the back of the skull.’
      • ‘The missing ‘tooth-shaped’ block at upper rear of the skull is made up of the squamosal and parietal.’
      • ‘The supraoccipital contacts the parietals of the skull table dorsally and the exoccipitals ventrally.’
      • ‘The postorbitofrontal forms its primary contact with the frontal rather than the parietal, and the supraoccipital is firmly attached to the ventral side of the parietal.’
      • ‘However, as the temporal fenestra expands to ludicrous proportions in the cynodonts, the skull table is reduced to a saggital crest formed by the parietal.’
  • 2parietalsNorth American informal Rules governing visits from members of the opposite sex to a college or university dormitory.

Origin

Late Middle English: from late Latin parietalis, from Latin paries, pariet- ‘wall’.

Pronunciation

parietal

/pəˈraɪəd(ə)l//pəˈrīəd(ə)l/