Noun | 1. | ![]() phylum Protozoa, Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore - a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals Cilioflagellata, Dinoflagellata, order Cilioflagellata, order Dinoflagellata - in some classifications considered a phylum of the kingdom Protista; in others included in the plant phylum Pyrrophyta subclass Zoomastigina, Zoomastigina - in some classifications considered a phylum of the kingdom Protista; holozoic or saprozoic flagellates Phytomastigina, subclass Phytomastigina - plantlike flagellates containing chlorophyll; often considered unicellular algae class - (biology) a taxonomic group containing one or more orders |