| Acronym | Definition |
|---|
| PIAI➣Provincetown International Art Institute (Provincetown, MA) |
| PIAI➣Primary Immunodeficiency Association of Ireland (Ashbourne, Ireland) |
| PIAI➣Pan IIT (Indian Institutes of Technology) Alumni India |
| PIAI➣Postoperative Intra-Abdominal Infection (surgery) |
| PIAI➣Personal Injury Accident Investigator |
| PIAI➣Protected Insertive Anal Intercourse (sexual behavior) |