Why is the ninth month called September?
anisotropic an·i·so·trop·ic (ān-ī'sə-trŏp'ĭk, -trō'pĭk)
Having physical properties that differ according to the direction of measurement.
Differing according to orientation, as light scattered by a liquid crystal; light striking the liquid crystal's surface at a 90° angle might not be reflected (so the surface appears dark when viewed head-on), while light striking it at shallower angles is reflected (so the surface appears illuminated when viewed from a shallow angle). Compare isotropic.