PAH

PAH or Pah may refer to:

Science and technology

Polycyclic aromatic hydrocarbon, one of a class of chemical compounds, organic pollutants
- PAH world hypothesis, hypothesis that proposes that the use of polycyclic aromatic hydrocarbons was a means for the origin of life
Polyallylamine hydrochloride, a polyelectrolyte used in polymer sheets
Polyanhydrides, a class of biodegradable polymers
Photoacid, where H indicates an H atom lost by an acid

Para-aminohippurate, a substance used in the measurement of blood flow in the kidneys
- PAH clearance, Para-aminohippuric acid clearance, a measurement of renal plasma flow
Paradoxical adipose hyperplasia, a potential complication of cryolipolysis
Phenylalanine hydroxylase, an enzyme involved in breaking down phenylalanine
Primary alveolar hypoventilation, a condition of inadequate air movement in the lungs
Pulmonary arterial hypertension, a condition of elevated blood pressure in the pulmonary artery

Plataforma de Afectados por la Hipoteca, a Spanish housing rights organization
Polish Humanitarian Action, a Polish non-governmental organisation (Polish: Polska Akcja Humanitarna)
Russian Academy of Sciences, Russian: Российская Академия Наук (РАН)
National Weather Service Paducah, Kentucky (WFO ID PAH)

Pah Wongso, born Victor Wijnhamer, Jr., (Chinese: 伯王梭; pinyin: Bó Wángsuō), an Indo social worker

Pan-American Highway
Pah, Gujarat, a village and former non-salute Rajput princely state in Gujarat, India
Pah Homestead, a historic home in Hillsborough, Auckland, New Zealand
Barkley Regional Airport, Paducah, Kentucky, U.S., IATA airport code PAH
Pah-Ute County, Arizona Territory