noun, plural pro·to·zo·ans, (especially collectively) pro·to·zo·a [proh-tuh-zoh-uh] /ˌproʊ təˈzoʊ ə/.
Examples from the Web for protozoan
Of almost equal value have been the researches upon the protozoan forms of animal life, as causes of disease.The Evolution of Modern Medicine|William Osler
Inside this snail's gut there is a protozoan that lives off the snail's ingested food.Planet of the Damned|Harry Harrison
This disease is caused by a Protozoan parasite, a trypanosome, which is transmitted from one host to another by the tsetse-fly.Insects and Diseases|Rennie W. Doane
The shelly agglomerates of these Protozoan Rhizopods constitute now very important rocks.The World Before the Deluge|Louis Figuier
Although the alg are useful guests, when they become too numerous the protozoan devours them.Disease and Its Causes|William Thomas Councilman