| Noun | 1. | Cnidosporidia - single-host parasites of lower vertebrates and invertebrates class Sporozoa, Sporozoa - strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites Actinomyxidia, order Actinomyxidia - parasites of worms Mycrosporidia, order Mycrosporidia - an order in the subclass Cnidosporidia Myxosporidia, order Myxosporidia - an order in the subclass Cnidosporidia class - (biology) a taxonomic group containing one or more orders |