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pia mater
noun
pia ma·ter
| \ ˈpī-ə-ˌmā-tər
, ˈpē-ə-ˌmä-
\
, ˈpē-ə-ˌmä-
\
Definition of pia mater
: the thin vascular membrane that invests the brain and spinal cord internal to the arachnoid and dura mater
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More Definitions for pia mater
pia mater
noun
pia ma·ter
| \ -ˈmāt-ər
\
\
Medical Definition of pia mater
: the delicate and highly vascular membrane of connective tissue investing the brain and spinal cord, lying internal to the arachnoid and dura mater, dipping down between the convolutions of the brain, and sending an ingrowth into the anterior fissure of the spinal cord
— called also pia