pia
/ˈpaɪə/(全称pia mater)
noun
mass noun
- Anatomy the delicate innermost membrane enveloping the brain and spinal cord【剖】软脑（脊）膜。参见MENINGES.
派生词
pial
adjective词源
late 19th cent.: from medieval Latin, in full literally 'tender mother', translating Arabic al-'ummar-rakīka.