Brave New World, where it is the third caste

Gamma-Hydroxybutyric acid, a narcotic (GHB)

photon, seen as an elementary particle in physics

Tetris, where it is the name for the J tetromino

Gamma ray, also Gamma radiation, an electromagnetic ray

Yu-Gi-Oh! Trading Card Game, which has a one monster card named "Gamma the Magnet Warrior".

Resident Evil (series), which has a monster called 'MA-124 Gamma Hunters'

Gamma-HCH, an insecticide

Euler-Mascheroni constant, a mathematical constant

Gamma function, a mathematical function

Gamma distribution, a probability distribution function

Gamma (shop) A chain of do it yourself hardware stores in the Netherlands and Belgium

Mega Man 3, where the final boss is named "Gamma"

Gamma correction, in video, graphics, color spaces, and photographic imaging

Zombie Powder, which has a character Gamma Akutabi

Tropical Storm Gamma, a Atlantic tropical storm

Bayer designation, the third brightest star

Christoffel symbol in General Relativity

Lapse rate, the temperature change with height in an atmosphere

Lorentz factor in relativity theory and astronomy

Elias gamma coding, in computer science, encoding, compression

voiced velar fricative in phonetics

Gamma wave, a type of brain wave

center of the Brillouin zone

reflection coefficient in electrical engineering

Gamma is a Greek letter. Used as a symbol or name it may refer to:

propagation constant of an electromagnetic wave

linewidth, relating to uncertainty of mass energy in short-lived particles

Gamma (band), a rock band

Latin gamma, used as an IPA symbol for voiced velar fricative, and in the alphabets of African languages.

Gamma is an old non-SI name for either a microgram or for a nanotesla, SI units

Adiabatic index, also known as the Heat capacity ratio, the ratio of the heat capacity at constant pressure to that at constant volume.

mathematical finance, where it is a risk measure, or Greek

GM Gamma platform - a subcompact automobile platform by General Motors

In the Earthbound, or Mother, series of Nintendo RPG games by Shigesato Itoi, γ (along with other Greek letters) is used as a classification of the strength of a PSI technique.