The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
isotropy n 1: (physics) the property of being isotropic; having the same value when measured in different directions [syn: isotropy, symmetry] [ant: anisotropy]