Source : Webster's Revised Unabridged Dictionary (1913)

Autocatalysis \Au`to*ca*tal"y*sis\, n. [Auto- + catalysis.]
   (Chem.)
   Self-catalysis; catalysis of a substance by one of its own
   products, as of silver oxide by the silver formed by
   reduction of a small portion of it. -- {Au`to*cat`a*lyt"ic},
   a.

Source : WordNet®

autocatalysis
     n : catalysis in which the catalyst is one of the products of
         the reaction
     [also: {autocatalyses} (pl)]