Source : Webster's Revised Unabridged Dictionary (1913)

Pathogenic \Path`o*gen"ic\, a. [Gr. ? disease + the root of ?
   birth.] (Med. & Biol.)
   Of or pertaining to pathogeny; producting disease; as, a
   pathogenic organism; a pathogenic bacterium.

Source : WordNet®

pathogenic
     adj : able to cause disease; "infective agents"; "pathogenic
           bacteria" [syn: {infective}, {morbific}]