Definition of gammas:
(n) :
The third letter of the Greek alphabet (Γ, γ), preceded by beta (Β, β) and followed by delta, (Δ, δ).
(n) :
(physics) A gamma ray or gamma-ray photon.
(n) :
(mathematics) The Gamma function, symbolized by Γ.
(n) :
(mathematics) A constant approximately equal to 0.57721566, symbolized by γ (also known as the Euler–Mascheroni constant).
(n) :
(physics) A non-SI unit of measure of magnetic flux density, equal to 1 nT.
(n) :
(physics) A non-SI unit of measure of mass, equal to 1 microgramme.