The Collaborative International Dictionary of English v.0.48:

aeolotropic \aeolotropic\, AEolotropic \[AE]`o*lo*trop"ic\, a.
   [Gr. ? changeful + ? a turning, ? to turn.] (Physics)
   Exhibiting differences of quality or property in different
   directions; having properties with different values along
   different axes; not isotropic. In specialized contexts,
   synonymous with anisotropic. [Also spelled eolotropic.]
   --Sir W. Thomson.

   Syn:
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Anisotrope \An"i*so*trope`\, Anisotropic \An`i*so*trop"ic\, a.
   [Gr. ? unequal + ? a turning, ? to turn.] (Physics)
   Not isotropic; having different properties in different
   directions; thus, crystals of the isometric system are
   optically isotropic, but all other crystals are anisotropic.
   [1913 Webster]

WordNet (r) 3.0 (2006):

anisotropic
    adj 1: not invariant with respect to direction; "anisotropic
           crystals" [ant: isotropic, isotropous]