Source : Webster's Revised Unabridged Dictionary (1913)

Isotropy \I*sot"ro*py\, n. (Physics)
   Uniformity of physical properties in all directions in a
   body; absence of all kinds of polarity; specifically, equal
   elasticity in all directions.

Source : WordNet®

isotropy
     n : (physics) the property of being isotropic; having the same
         value when measured in different directions [syn: {symmetry}]
         [ant: {anisotropy}]