Azo or AZO may refer to:
The Azores (ə-ZOHRZ or AY-zohrz; Portuguese: Açores, [ɐˈsoɾɨʃ]), officially the Autonomous Region of the Azores (Região Autónoma dos Açores), is one of the two autonomous regions of Portugal, an archipelago composed of nine volcanic islands in the North Atlantic Ocean about 1,360 km (850 mi) west of continental Portugal, about 1,643 km (1,021 mi) west of Lisbon, in continental Portugal, and about 1,925 km (1,196 mi) southeast of Newfoundland, Canada.
Azoospermia is the medical condition of a man whose semen contains no sperm. It is associated with infertility, but many forms are amenable to medical treatment.
The Azov Regiment (Ukrainian: Полк Азов) is a National Guard of Ukraine regiment. The unit is based in Mariupol in the Azov Sea coastal region.
Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime.
Azolla (mosquito fern, duckweed fern, fairy moss, water fern) is a genus of seven species of aquatic ferns in the family Salviniaceae.
Azores Airlines, previously known as SATA Internacional, is an Azorean airline based in the municipality of Ponta Delgada, on the island of São Miguel in the autonomous archipelago of the Azores.
Azomethine ylides are nitrogen-based 1,3-dipoles, consisting of an iminium ion next to a carbanion. They are used in 1,3-dipolar cycloaddition reactions to form 5-membered heterocycles, including pyrrolidines and pyrrolines.
Azodicarbonamide, or azo(bis)formamide, is a chemical compound with the molecular formula C2H4O2N4. It is a yellow to orange-red, odorless, crystalline powder.
Azo compounds are compounds bearing the functional group R–N=N–R′, in which R and R′ can be either aryl or alkyl.