pia mater noun phr. [pʌɪǝ 'meɪtǝ] LME.
[medieval Latin = tender mother, translating Arab. al-'umm ar-ra&kdbelow;ī&kdbelow;a thin mother, tender mother: see DURA MATER.]
Anatomy. A delicate, fibrous, highly vascular membrane which forms the innermost of the three meninges enveloping the brain and spinal cord. Cf. PIA noun¹.

■ pia-'matral adjective of or pertaining to the pia mater M19.

[TahlilGaran] English Dictionary ▲