| Amoeba, also spelled ameba, plural amoebas or amoebae, any of the microscopic unicellular protozoans of the rhizopodan order Amoebida. |
| Didinium is a swimming, carnivorous protozoan that can perceive moving protozoans and aim a dart, a trichocyst, to kill or immobilize its mobile prey. |
| Schindler says more of a problem are the protozoans that originate from livestock. |
| The Antarctic microfauna includes heliozoans, rotifers, tardigrades, nematodes, and ciliate protozoans. |
| In 1883, he demonstrated that phototaxis of other protozoans toward Euglena was due to light-induced production of oxygen in the latter. |
| Support of the body is achieved in many protozoans by a simple stiff, translucent, nonliving envelope called a pellicle. |
