Noun | 1. | ![]() phylum Protozoa, Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers ciliate, ciliated protozoan, ciliophoran - a protozoan with a microscopic appendage extending from the surface of the cell Infusoria, subclass Infusoria - in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter genus Paramecium - freshwater ciliate with an oval body and long deep oral groove genus Tetrahymena - protozoa having four membranous ciliary organelles genus Stentor - trumpet-shaped protozoa with a ciliated spiral feeding funnel genus Vorticella - ciliated protozoans that have a goblet-shaped body with a retractile stalk class - (biology) a taxonomic group containing one or more orders |