protozoa

Primordial or first-formed animals, or cell-animals; protozoans: a subkingdom of Animalia or prime division of animals, contrasted with Metazoa, or all other animals collectively.

The lowest of the grand divisions of the animal kingdom.

Plural form of protozoan.

Plural form of protozoon.

in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers