Noun

1. The name of the third letter of the Greek alphabet (Γ, γ), preceded by beta (Β, β) and followed by delta, (Δ, δ).
2. The Gamma function, symbolized by Γ.
3. A constant approximately equal to 0.55721566, symbolized by γ.
4. A unit of magnetic field equal to 1 nT.

Noun

1. Gamma; the Greek letter Γ (lowercase γ).
2. Gammut; the range of possible values, especially:

   the set of tones available from a musical instrument, or

   the set of possible color values available from a photographic or electronic device.