nonhomogeneous
adjective
non·ho·mo·ge·neous ˌnän-ˌhō-mə-ˈjē-nē-əs 
-ˈjēn-yəs
: made up of different types of people or things : not homogeneous
nonhomogeneous neighborhoods
the nonhomogenous atmosphere of the planet
a nonhomogenous distribution of particles
Word History
First Known Use
1853, in the meaning defined above