1. a single-celled microscopic organism that belongs to the kingdom Protista
Usage: biology

1. relating to or characteristic of protozoans
Usage: biology

Examples

• The amoeba is a common type of protozoan found in pond water.
• Scientists studied the protozoan under a powerful microscope.
• Many protozoans move using tiny hair-like structures called cilia.
• The protozoan parasite causes malaria in humans.
• Protozoan organisms reproduce by dividing into two identical cells.
• The biology class examined protozoan specimens from the lake.
• Some protozoan species can survive in extreme environments.