heterogeneous

adj. made up of parts which are different from each other; incongruous, unlike, different

Heterogeneous (American English)) means that something (an object or system) consists of a diverse range of different items. It is the antonym of , which means that an object or system consists of many identical items. Matters of a quantum can exist in homogenous or in heterogeneous or in combined distributions. The term is often used in a scientific (such as a kind of catalyst), mathematical, sociological or statistical context.
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Adjective
1. consisting of elements that are not of the same kind or nature; "the population of the United States is vast and heterogeneous"
(synonym) heterogenous
(antonym) homogeneous, homogenous
(similar) assorted, miscellaneous, mixed, motley, sundry(a)
(see-also) different
2. originating outside the body
(synonym) heterogenous

(a.)
Differing in kind; having unlike qualities; possessed of different characteristics; dissimilar; -- opposed to homogeneous, and said of two or more connected objects, or of a conglomerate mass, considered in respect to the parts of which it is made up.
  

Made up of elements or ingredients that are not alike.