pia

1. anatomyThe pia mater, the innermost of the meninges that protect the brain and spinal cord.

   One screen in the theatre relays live colour pictures of Harkness and his colleague Tiernan Byrnes's progress, cutting and pushing through first the dura, then the arachnoid and finally the pia, the thin, spider's web-type membranes that cover the brain itself.

   2009 January 25, Denis Campbell, “Kian, 4, needs a miracle. He's in the right place”, in The Observer

1. uncountablePolynesian arrowroot (Tacca leontopetaloides), whose fleshy tubers yield arrowroot starch.

1. abbreviationinitialismhuman sciencesInitialism of Proto-Indo-Aryan.

plural PIAs

1. abbreviationcountableinitialismuncountablemedicineInitialism of porcine intestinal adenomatosis.
2. abbreviationcountableinitialismuncountableInitialism of personal injury accident.
3. InternetabbreviationcountableinitialismuncountableInitialism of pain in the ass.
4. abbreviationcountableinitialismuncountablelifestyleInitialism of penis in anus.
5. abbreviationcountableinitialismuncountableInitialism of privacy impact assessment.

1. A female given name from Latin.
2. A surname

1. A town and commune of Pyrénées-Orientales department, Occitania, France, historically part of Northern Catalonia.