CAH

CAH can stand for:

Science and technology

 * Congenital adrenal hyperplasia
 * Calcium Aluminate Hydrate, an important phase in cement chemistry
 * Chlorinated Aromatic Hydrocarbon
 * CAH, a mnemonic used to teach trigonometry, showing that cosine is the ratio of adjacent over hypotenuse

Companies and organizations

 * Cardinal Health (NYSE:CAH)
 * Community of All Hallows, an Anglican religious community for women
 * Capital Airport Holding, airport holdings company in the People's Republic of China
 * Charlan Air Charter, a South African airline with the ICAO airline designator CAH

Media

 * Cambridge Ancient History, a bibliographic abbreviation for the work edited by Cambridge University Press
 * Calvin and Hobbes, a newspaper comic strip from 1985 to 1995
 * Cyanide and Happiness, a daily webcomic

Other uses

 * Crime against humanity
 * Cards Against Humanity, a party game
 * Critical Access Hospital (CAH); these must have no more than 25 beds, not counting 10 extra psychiatric beds and 10 extra inpatient rehab beds, and must be located in a rural area or an area treated as rural, be certified by the state as being a necessary provider of healthcare services to area residents, and be more than a 35-mile drive away from a hospital or other healthcare facility
 * Controlled-access highway
 * CAH, the IATA airport code for Cà Mau Airport