What does anisotrope or anisotropic mean?
The definition of anisotrope and anisotropic
An”i*so*trope`, An`i*so*trop”ic, a.
Etym: [Gr. (Physics)

Not isotropic; having different properties in different directions; thus, crystals of the isometric system are optically isotropic, but all other crystals are anisotropic.