Having to do with the simplest organisms in the animal kingdom. Protozoa are single-cell organisms, such as ameba, and are different from bacteria, which are not members of the animal kingdom. Some protozoa can be seen without a microscope. Found on http://www.cancer.gov/dictionary?expand=P
Synonym for protozoan ... 1. Any individual of the protozoa, protozoon. ... 2. Of or pertaining to the protozoa, protozoal. ... (18 Nov 1997) ... Found on http://www.encyclo.co.uk/local/20973