Meninge Directly Covering the Surface of the CNS

This page is the CodyCross answer for the clue below from Street Fair, Group 1315, Puzzle 3 (Candles and Crystals).

Question is: Meninge Directly Covering the Surface of the CNS

and the answer is: PIAMATER

Word Meaning:

PIA MATER — (anatomy) The innermost of the meninges, the membranes that surround the brain and spinal cord.

Definitions from Wiktionary.