Source : Webster's Revised Unabridged Dictionary (1913)

Heterogenous \Het`er*og"e*nous\, a. (Biol.)
   Of or pertaining to heterogenesis; heterogenetic.

Source : WordNet®

heterogenous
     adj 1: consisting of elements that are not of the same kind or
            nature; "the population of the United States is vast
            and heterogeneous" [syn: {heterogeneous}] [ant: {homogeneous}]
     2: originating outside the body [syn: {heterogeneous}] [ant: {autogenous}]

Source : Free On-Line Dictionary of Computing

heterogenous
     
         It's spelled {heterogeneous}.
     
        (1999-06-10)