Source : Webster's Revised Unabridged Dictionary (1913)

Homogeneity \Ho`mo*ge*ne"i*ty\, n. [Cf. F.
   homog['e]n['e]it['e].]
   Same as {Homogeneousness}.

Source : WordNet®

homogeneity
     n 1: the quality of being similar or comparable in kind or
          nature; "there is a remarkable homogeneity between the
          two companies" [syn: {homogeneousness}] [ant: {heterogeneity}]
     2: the quality of being of uniform throughout in composition or
        structure