Gaia or Gaea derives from the Greek words Ge (??) = Earth (Pelasgian), and *aia = grandmother (PIE). Thus, Gaia (????) can refer to any one of the following:

• Gaia, a goddess from Greek mythology; also Terra or Tellus, her equivalent in Roman mythology, and Ki, her equivalent in Sumerian mythology
• Gaia hypothesis - an ecological hypothesis that proposes that living and nonliving parts of the earth are viewed as a complex interacting system that can be thought of as a single organism
• Gaia's Revenge - features studies forecast about unintended consequences of brewing climate storms
• Gaia philosophy, a set of philosophical views based on ecosystems and the concept of a "living planet"
• Gaia Movement - international network of groups drawing inspiration from the Gaia hypothesis

Fiction

• Gaia , a fictional planet in Isaac Asimov's Foundation Series and where all animals, plants, and even inanimate matter are telepathically connected, forming a single sentient planet-wide entity
• Gaea trilogy, a trilogy of science fiction novels by John Varley

• Gaia Gear, a science-fiction novel written by Yoshiyuki Tomino, based on the Gundam metaseries
• ZGMF-X88S Gaia Gundam, a fictional weapon from the Cosmic Era of the anime Gundam metaseries
• Gaia , a fictional comic book character in the Marvel Universe (an alien mutant and former member of Generation X)
• Gaea , a fictional comic book character in the Marvel Universe (Goddess of the Earth)
• Gaia, Rogue Champion, a character in the PlayStation game Battle Arena Toshinden
• Illusion of Gaia, the second title in the Soul Blazer series of video games for the Super Nintendo Entertainment System
• Ultraman Gaia
• Gaia , the name of the planet in Final Fantasy VII.
• Gaia is also the name of the planet in Final Fantasy IX.
• Gaia is the name of 'Earth's spirit' in the movie The Spirits Within.
• Gaia , a goddess from DC's Green Lantern comics
• Gaia , a shojo-ai manga comic by chuu
• Gaea , the fictional planet where the anime The Vision of Escaflowne takes place
• Gaia (World of Darkness) is the god that created the Garou (werewolves) to defend the planet against the human race
• Gaea, the Incarnation of Nature in Piers Anthony's Incarnations of Immortality book series
• Gaea, a fictional island off the coast of Portugal in Madeleine L'Engle's novel The Arm of the Starfish
• Gaia-class worlds are perfect for human life in games like Master of Orion and Legions of Iron.
• Gaia, the heroine of the series Fearless by Francine Pascal
• Gaia, the spirit of Earth in the animated television series Captain Planet and the Planeteers.
• Gaia, the Fierce Knight, duel monsters card from anime series Yu-Gi-Oh!
• Gaia is the name of the "Mother Earth" AI in Microsoft's popular computer game Age of Empires II. It controls all units on the map that are not player-owned (including wild animals, sheep and turkeys, and even trees).
• Gaea is also one of many gods in the The Gathering Trading Card Game, see Planeswalker.
• Gaia is the name of the planet mutated by the Bacterion Emperor prior to Gradius IV: Revival.
• Gaia is the name of the essense of the earth in Illusions of Gaia for the SNES. She serves as the advise-giver, healer,and save point of the game for Will throughout the game.
• The Gaians are a faction in the Sid Meier game Alpha

Centauri

• Gaea (after the goddess) is the name "The Golden One" is given at the end of the book The Anthem, by Ayn Rand
• Gaia Records is the name of a publishing company in the manga Nana

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Astronomy

• Gaia mission, a space astronomy mission due for launch in 2011 by the European Space Agency
• Gaea , a crater on Amalthea (Jupiter's third moon)
• 1184 Gaea, an asteroid

Music

• Gaia is a pseudonym of DJ Armin Van Buuren
• "Gaia" is an album and song by Valensia
• "Gaia" is a song by Janne da Arc ???????
• Gaia (1995 EP) is an album by the Swedish band Tiamat
• Gaia, an album by Olivia Newton-John
• Gaia , an album by Mägo de Oz
• "Gaia ", a song by The Devin Townsend Band
• Gaia ??? is a Korean Rock Band
• Gaia, a song by James Taylor; 1997 album Hourglass
• Gaia Epicus, a power progressive heavy metal band from Norway.
• Banco de Gaia, an electronic music outfit specialising in experimental and world music.

Places

• La Fountae de Gaia, in the center of the main Piazza of Siena, around which the traditional horse-race, the Palio, runs every summer.
• Vila Nova de Gaia, a city in Portugal
• GAIA, the acronym for the Grantley Adams International Airport located in Barbados.
• Gaià, a river in Catalonia, Spain
• Gaia , an arts center in Havana, Cuba

Miscelleaneous

• Global Action for the Interest of Animals, a Belgian animal rights organization.
• Gaia Online, an Internet forum
• GAEA Japan, a Japanese women's professional wrestling promotion
• Gaia Trafikk, the largest public transport company in Bergen, Norway until it merged with Hardanger Sunnhordlandske Dampskipsselskap, forming Tide.
• Gaea Armor, a feature from Mega Man X5

See also

• Pangaea, the massive pre-historic continent that later split into several continents.
• Gaya

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