Dictionary:gamma (γ)

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1. A unit of magnetic field equal to one nanotesla, the preferred SI name. 1 gamma=10-5 gauss=10-9 tesla.

2. The ratio of S- to P-wave velocities.

3. A Thomsen anisotropic parameter (q.v.), the fractional change in the S-wave velocity):

,


where c44, c66 are transverse isotropy elastic constants.