• WordNet 3.6
    • n Sporozoa strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites
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Webster's Revised Unabridged Dictionary
    • n. pl Sporozoa (Zoöl) An extensive division of parasitic Protozoa, which increase by sporulation. It includes the Gregarinida.
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Century Dictionary and Cyclopedia
    • Sporozoa Mouthless parasitic corticate protozoans, a class of Protozoa, synonymous with Gregarinida, but more comprehensive, including many organisms not ordinarily classed with the gregarines. They are parasitic, and occur in almost all animals. Most are very minute, but some attain the largest size by far known among protozoans. The Sporozoa have been divided into four subclasses, Gregarinidea, Coccidiiden, Myxosporidia, and Sarcocystidia. Also called Cytozoa.
    • Sporozoa Plural of sporozoön.
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Webster's Revised Unabridged Dictionary
NL., from Gr. spo`ros a spore + zo^,on an animal


In literature:

The Sporozoa vary greatly in appearance, organization and life-history.
"Insects and Diseases" by Rennie W. Doane