| umls-concept:C0031869 | skos:definition | MSH: The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.,CSP: innermost layer of the leptomeninges, which adheres to the brain and spinal cord and conforms to all the irregularities on their surfaces.,NCI: The delicate, highly vascular, innermost membrane encasing the brain and spinal cord. | lld:umls |
