Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

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