Anatomy
pia mater Audio
pi·a ma·ter [ pahy-uh mey-ter, pee-uh ]
Subclass of:
Meninges
Definitions related to pia mater:
  • Innermost layer of the leptomeninges, which adheres to the brain and spinal cord and conforms to all the irregularities on their surfaces.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • The delicate, highly vascular, innermost membrane encasing the brain and spinal cord.
    NCI
    U.S. National Cancer Institute, 2021
  • The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.