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  • (environment) In hydrology, the conditions under which one or more hydraulic properties of an aquifer vary from a reference point.
    Source: Terms of the Environment
  • (geology)
  1. The property of being anisotropic, or exhibiting properties (such as velocity of light transmission, conductivity of heat or electricity, or compressibility) with different values when measured along axes in different directions. Webster 3rd
  2. The condition of having different properties in different directions as in geologic strata that transmit sound waves with different velocities in the vertical and in the horizontal directions. AGI
  3. Optically descriptive of crystalline materials having light velocities and indices of refraction dependent upon the crystallographic direction of the electric vector (vibration direction) during transmission or reflection; it includes all nonisometric crystals. CF: uniaxial; extinction; isotropy.
  4. In geostatistics, the situation where a variogram exhibits a longer range (i.e., better correlation) in one direction than in another.
    Source: Dictionary of Mining, Mineral, and Related Terms

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