pia mater

(pī′ə māt′ər)

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

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

See pia mater in American Heritage Dictionary 4

noun

The fine vascular membrane that closely envelops the brain and spinal cord under the arachnoid and the dura mater.

Origin:

Origin: Middle English

Origin: , from Medieval Latin pia māter

Origin: : Latin pia, tender

Origin: + Latin māter, mother (translation of Arabic ’umm raqīqa : ’umm, mother + raqīqa, tender)

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