het·er·o·ge·ne·ous / ˌhetərəˈjēnēəs/ • adj. diverse in character or content: a large and heterogeneous collection. ∎  Chem. of or denoting a process involving substances in different phases (solid, liquid, or gaseous). ∎  Math. incommensurable through being of different kinds, degrees, or dimensions.DERIVATIVES: het·er·o·ge·ne·i·ty / -jəˈnēətē/ n.het·er·o·ge·ne·ous·ly adv.het·er·o·ge·ne·ous·ness n.

heterogeneous (het-er-oh-jee-ni-ŭs) adj. having different properties or constituents.
—heterogeneity (het-er-oh-jin-ay-iti) n.