Real Dictionary

sporozoan in American English
any of a class (Sporozoa) of parasitic protozoans that usually pass through phases of both sexual and asexual generation, frequently in different hosts, during which sporogenesis takes place, including the organisms that cause malaria and Texas fever
adjective: belonging or pertaining to the Sporozoa
noun: any parasitic spore-forming protozoan of the phylum (or class) Sporozoa, several species of which, as plasmodia, cause malaria

sporozoan in British English
noun: any parasitic protozoan of the phylum Apicomplexa (or Sporozoa), characterized by a complex life cycle, part of which is passed in the cells of the host, and the production of asexual spores: includes the malaria parasite