A heterogeneous mixture is a mixture that is not evenly mixed.
Heterogeneity (the noun) means the opposite of homogeneity, which means "uniformly distributed".
Heterogeneous, in Biology, refers to a substance originating outside of the body. This isn't to be confused with heterogeneous, which is a term in chemistry meaning that a mixture has separate parts.
Heterogeneity refers to how heterogeneous a mixture is. Heterogeneous mixtures are uniform and completely combined. The heterogeneity of a mixture describes how uniform the mixture is.
In chemistry, heterogeneous means composed of different substances or the same substance in different phases, as solid ice and liquid water.
Heterogeneous is with non uniform composition
Oxygen gas is homogeneous matter.
The root word of heterogeneous is hetero, whos meaning is other. ; heterogeneous : 1624, from Gk. heterogenes, from heteros "different" + genos "kind, gender, race stock"