- (mathematics) A constant approximately equal to 0.55721566, symbolized by γ.
- (mathematics) The Gamma function, symbolized by Γ.
- (industries) slope of log-log plot of video input and luminance output.
- The name of the third letter of the Greek alphabet (Γ, γ), preceded by beta (Β, β) and followed by delta, (Δ, δ).
- (physics) A unit of magnetic field equal to 1 nT.