Anisotropy /ˌænɪˈsɒtrəpi/, /ˌænaɪˈsɒtrəpi/ is the property of being directionally dependent, which implies different properties in different directions, as opposed to isotropy. It can be defined as a difference, when measured along different axes, in a material's physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.) An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it.
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