Geo- is a prefix derived from the Greek word γη or γαια, meaning "earth", usually in the sense of "ground or land”.
GEO or Geo may also refer to:
Arts, entertainment, and media
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GEO (magazine), a popular scientific magazine
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Geo, a fictional character on the Nick Jr. television show, Team Umizoomi
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Geo (Ninjago), character from Ninjago
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Geo City, a fictional city in the videogame Raw Danger
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Geo Stelar, the protagonist in Mega Man Star Force
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Geo TV, a pay television channel in Pakistan
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Geo, the name of the main currency used in the videogame Hollow Knight
Brands and enterprises
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Geo (automobile), a defunct brand of entry-level cars produced by General Motors
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Georgetown University, abbreviated as Geo. in Bluebook
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GEO Group, a prison corporation
Computing and science
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Geo (microformat), a microformat for marking up geographical coordinates in (X)HTML
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Gene Expression Omnibus, or GEO, a National Center for Biotechnology Information database for gene expression
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GEO 600, a detector for gravitational radiation
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Geo URI, an IETF proposed standard for making URIs for physical locations
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Geosynchronous Equatorial Orbit, an orbit used for satellites that remain at a fixed position above the ground
Groups and organizations
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General Education Officer, the basic rank of teachers of the Ministry of Education in Singapore
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Group on Earth Observations, an intergovernmental organization
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Grupo Especial de Operaciones, a special SWAT division of the Spanish police
People
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Geo Bogza, Romanian poet and essayist
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Geo Dumitrescu, Romanian poet
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Geo Rutherford, American artist and TikToker
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George (given name), commonly abbreviated Geo.
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Christian Geo Heltboe, Danish comedian known by his middle name
Places
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Geo (landscape), a creek (inlet) or gulley in the Orkney and Shetland Islands
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GEO, the IOC country code and three letter country code for Georgia (country), in Eurasia
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GEO, the IATA code for Cheddi Jagan International Airport
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Estadio Casas GEO, stadium in Mexicali, Mexico