Pai or PAI may refer to:

People

* Pai (surname), Indian surname from coastal Karnataka and Goa plus people with the name * Pai (Chinese surname), includes Chinese name origin, plus people with the name

Fictional characters

* Pai (Manga character), a character from "3x3 Eyes" * Pie (Tokyo Mew Mew), a villain from the manga and anime series ''Tokyo Mew Mew''

Places

* Pai, Iran, a village in Isfahan Province * Pai, Thailand, a small town in Mae Hong Son Province ** Pai District, the district around the town ** Pai River ** Pai Airport * Pai, Tank, a union council in Pakistan * Pai Northern Thai Kitchen, a restaurant chain in Toronto, Canada

Games

* Gwat Pai, Chinese dominoes set * Pai Gow, Chinese gambling game ** Pai gow poker, Americanized version

Other uses

* Pai languages (Paipai, Walapai, Havasupai) * Pai dialect of the Northern Sotho language * Pai (fish trap) * "Pai", a 2016 song by Bad Gyal

Acronyms

* PAI Partners, a French private equity firm * PAI (Personal Activity Intelligence), a fitness indicator developed by researcher Ulrik Wisløff * Parachute Association of Ireland, a representative/regulatory body for skydivers in Ireland * ''Parti Africain de l’Indépendance'' ( African Independence Party), a former political party in Bourkina Faso * PartnerAid International, a German-based Christian humanitarian organization * Partnership on AI, US-based tech nonprofit committed to responsible AI use * Pathogenicity island, a distinct class of genomic island which is acquired by horizontal transfer * Periodic annual increment * Persatuan Arab Indonesia, an association of Arab Indonesians * Personality Assessment Inventory, a test given by psychologists * Photoacoustic imaging *

Plasminogen activator inhibitor-1 Plasminogen activator inhibitor-1 (PAI-1) also known as endothelial plasminogen activator inhibitor (serpin E1) is a protein that in humans is encoded by the ''SERPINE1'' gene. Elevated PAI-1 is a risk factor for thrombosis and atherosclerosis. ...

(PAI-1), a protein that inhibits fibrinolysis (breakdown of blood clots) *

Plasminogen activator inhibitor-2 Plasminogen activator inhibitor-2 (placental PAI, SerpinB2, PAI-2), a serine protease inhibitor of the serpin superfamily, is a coagulation factor that inactivates tissue plasminogen activator and urokinase. It is present in most cells, especial ...

(PAI-2), another protein that inhibits fibrinolysis * '' Poalei Agudat Yisrael'', an Israeli political party * ''Polizia dell'Africa Italiana'' ( Italian Police of Africa, police force in the Italian colonies * Polyamide-imide, a thermoplastic polymer *

Polyatomic ion A polyatomic ion (also known as a molecular ion) is a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that usually has a net charge that is not zero, or in special c ...