The Collaborative International Dictionary of English v.0.48:

Parseeism \Par"see*ism\ (p[aum]r"s[=e]*[i^]z'm or
   p[aum]r*s[=e]"[i^]z'm), prop. n.
   The religion and customs of the Parsees.

   Syn: Parsiism.
        [1913 Webster]

WordNet (r) 3.0 (2006):

Parseeism
    n 1: the faith of a Zoroastrian sect in India [syn: Parsiism,
         Parseeism]