pia

name

1. (abbreviation, alt-of, initialism)Initialism of Proto-Indo-Aryan.
2. A female given name from Latin.
3. A surname
4. A town and commune of Pyrénées-Orientales department, Occitania, France, historically part of Northern Catalonia.

noun

1. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of porcine intestinal adenomatosis.
2. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of personal injury accident.
3. (Internet, abbreviation, alt-of, countable, initialism, uncountable)Initialism of pain in the ass.
4. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of penis in anus.
5. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of privacy impact assessment.
6. The 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.”

7. (uncountable)Polynesian arrowroot (Tacca leontopetaloides), whose fleshy tubers yield arrowroot starch.