PIA MATER Meaning of PIA MATER in English pia mater BrE AmE ˌpa ɪ ‿ə ˈmeɪt ə ˌpi ː ‿ AmE \ -ˈmeɪt̬ ə r ˌpiː ə ˈmɑːt̬ ə r, ˈ••ˌ•• Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012