(medicine) Initialism of porcine intestinal adenomatosis. / Initialism of personal injury accident. / (sexuality) Initialism of penis in anus.

(anatomy) The pia mater, the innermost of the meninges that protect the brain and spinal cord.

A perennial Polynesian herb whose fleshy tubers yield arrowroot.

A technique for bringing a drowning non-swimmer to shore, by holding their head out of the water, encircling their waist or hips with one arm, and supporting their buttocks or thigh on one's hip, while propelling oneself by kicking.

plural of Pia carry