| Meaning | Any of diverse minute acellular or unicellular organisms usually nonphotosynthetic. |
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| Synonym | protozoan |
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| Member of | Protozoa, phylum Protozoa | In some classifications considered a superphylum or a subkingdom |
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| Parts | cytostome | mouth of a protozoan |
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| Narrower | arcella | An amoeba-like protozoan with a chitinous shell resembling an umbrella |
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| ciliate, ciliated protozoan, ciliophoran | A protozoan with a microscopic appendage extending from the surface of the cell |
| difflugia | A protozoan with an ovoid shell of cemented sand grains |
| euglena | minute single-celled green freshwater organism having a single flagella |
| flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore | A usually nonphotosynthetic free-living protozoan with whiplike appendages |
| plantlike flagellate | unicellular organisms having many characteristics of typical algae |
| rhizopod, rhizopodan | protozoa characterized by a pseudopod |
| sarcodinian, sarcodine | protozoa that move and capture food by forming pseudopods |
| sporozoan | Parasitic spore-forming protozoan |
| Broader | protoctist | Any of the unicellular protists |
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| Spanish | protozoarios, protozoo |
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| Catalan | protozou |
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| Adjectives | protozoan | of or relating to the Protozoa |
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