pia mater

pia mater Definition

pia ma·ter (pī′ə māt′ər)

the vascular membrane immediately enveloping the brain and spinal cord and surrounded by the arachnoid and dura mater

Etymology: ME < ML (lit., gentle mother < fem. of L pius, tender, pious + mater, mother): used as transl. of Ar al 'umm al raqīqa

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