The Collaborative International Dictionary of English v.0.48:

Sporozoa \Spo`ro*zo"a\ (-z[=o]"[.a]), n. pl. [NL., from Gr.
   spo`ros a spore + zo^,on an animal.] (Zool.)
   An extensive division of parasitic Protozoa, which increase
   by sporulation. It includes the Gregarinida.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Sporozoa
    n 1: strictly parasitic protozoans that are usually immobile;
         includes plasmodia and coccidia and piroplasms and malaria
         parasites [syn: Sporozoa, class Sporozoa]