The Collaborative International Dictionary of English v.0.48:

Zymogenic \Zym`o*gen"ic\, a. (Biol.)
   (a) Pertaining to, or formed by, a zymogene.
   (b) Capable of producing a definite zymogen or ferment.
       [1913 Webster]

   Zymogenic organism (Biol.), a microorganism, such as the
      yeast plant of the Bacterium lactis, which sets up
      certain fermentative processes by which definite chemical
      products are formed; -- distinguished from a pathogenic
      organism. Cf. Micrococcus.
      [1913 Webster] Zymologic