Gamma (disambiguation)

Gamma (Γ or γ) is the third letter of the Greek alphabet.

Gamma may also refer to:

Science and technology[edit]

Gamma ray or gamma radiation (γ or $\gamma$ ), an electromagnetic ray
Photon (γ), an elementary particle, the quantum of the electromagnetic field
Propagation constant (γ), of an electromagnetic wave
Heat capacity ratio or adiabatic index (γ), the ratio of the heat capacity at constant pressure to that at constant volume
Lorentz factor (γ), in relativity and astronomy
Gamma (eclipse) (γ), how central (how close to the middle of the body) an eclipse is
Shear strain (γ)
Surface tension (γ)
Body effect (γ), on threshold voltage in field-effect transistor technology
Christoffel symbols (Γ), in general relativity
Circulation (physics) (Γ)
Reflection coefficient (Γ), of a wave reflected by an impedance discontinuity
Decay width (Γ), of a particle in high-energy physics
GAMMA, an extensive air shower array in Armenia
γ, a non-SI unit of magnetic flux density, 1nT
γ, the third-brightest star of a constellation, in Bayer designation
Γ, center of the Brillouin zone

Gamma wave, a type of brain wave
Gamma-glutamyltransferase, a transferase present in the cell membranes of many tissues
SARS-CoV-2 Gamma variant, one of the variants of SARS-CoV-2, the virus that causes COVID-19
gamma-Hydroxybutyric acid, a neurotransmitter and a depressant drug
gamma-hexachlorocyclohexane or Lindane, an organochlorine chemical and neurotoxin

General Motors Gamma platform, a subcompact automobile platform by General Motors
Bristol Siddeley Gamma, a family of British rocket engines
Hyundai Gamma engine, a family of 1.6 L gasoline inline-4 engines
Suzuki RG250 Gamma, a two-stroke motorcycle

Gamma (store), a Dutch hardware-store chain
Gamma Group, developers of FinFisher and associated suites of malware
Gamma (agency), a French photo agency
Groupe des Architectes Modernes Marocains, an architecture collective in Morocco

Gamma (band), American rock band
Gamma (miniseries), a 1975 Italian television miniseries
Gamma (wrestler), a Japanese professional wrestler working for the Dragon Gate promotion
Gamma chord, a type of musical chord
Gamma (album), a 2024 album by Gesaffelstein

E-102 Gamma, one of the E-Series characters in the Sonic the Hedgehog franchise
Gamma Akutabi, a fictional character from the manga Zombiepowder.
Γ, the emblem of the character Waluigi in the Mario franchise
Gamma Metroids, an evolution of the Metroid species from the game Metroid II: Return of Samus
Gamma radiation, responsible for creation of, and the power source to, The Incredible Hulk and derivative characters

Latin gamma (ɣ), an IPA symbol for voiced velar fricative and in the alphabets of African languages
Voiced velar fricative (γ), in phonetics