The Collaborative International Dictionary of English v.0.48:

Zolaism \Zo"la*ism\, n.
   The literary theories and practices of the French novelist
   Emile Zola (1840-1902); naturalism, esp. in a derogatory
   sense. -- Zo"la*ist, n. -- Zo`la*is"tic, a. --
   Zo"la*ize, v.
   [Webster 1913 Suppl.]