Definition from Wiktionary, the free dictionary
Medieval Latin, meaning "tender mother".
- (anatomy) The innermost of the meninges, the membranes that surround the brain and spinal cord.
2013 May-June, Charles T. Ambrose, “Alzheimer’s Disease”, in American Scientist, volume 101, number 3, page 200:
- Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems— […]. Such a slow-release device containing angiogenic factors could be placed on the pia mater covering the cerebral cortex and tested in persons with senile dementia in long term studies.
innermost of the meninges