protozoan, protozoon

any of diverse minute acellular or unicellular organisms usually nonphotosynthetic

• sarcodinian, sarcodine — protozoa that move and capture food by forming pseudopods
• rhizopod, rhizopodan — protozoa characterized by a pseudopod
• arcella — an amoeba-like protozoan with a chitinous shell resembling an umbrella
• difflugia — a protozoan with an ovoid shell of cemented sand grains
• ciliate, ciliated protozoan, ciliophoran — a protozoan with a microscopic appendage extending from the surface of the cell
• euglena — minute single-celled green freshwater organism having a single flagella; often classed as algae
• flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore — usually nonphotosynthetic free-living protozoan with whiplike appendages; some pathogens of humans and other animals
• plantlike flagellate — unicellular organisms having many characteristics of typical algae
• sporozoan — parasitic spore-forming protozoan

• protoctist — any of the unicellular protists

• cytostome — mouth of a protozoan

• Protozoa, phylum Protozoa — in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers