Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
1. of or pertaining to protozoa.
2. an organism belonging to the Protozoa.
1. A member of the phylum Protozoa. Synonym(s): protozoon
2. Relating to protozoa. Synonym(s): protozoal
n. pl. proto·zoans or proto·zoa (-zō′ə) also proto·zoons
Any of numerous chiefly single-celled eukaryotic organisms, most of which move about freely and ingest food, including the amoebas, ciliates, flagellates, and apicomplexans. Protozoans along with certain algae, oomycetes, and some other groups make up the protists.
pro′to·zo′an, pro′to·zo′al, pro′to·zo′ic adj.
1. A member of the phylum Protozoa.
2. Relating to protozoa.
protozoanany member of the phylum Protozoa (sometimes regarded as a subkingdom of the animal kingdom), including unicellular or acellular organisms. The members of the group feed as HOLOPHYTES, SAPROPHYTES or in a HOLOZOIC manner, move by means of FLAGELLA, CILIA or PSEUDOPODIA, and reproduce by FISSION or CONJUGATION.
Protozoan (plural, protozoa)
A single-celled, usually microscopic organism, such as B. coli, that is eukaryotic and, therefore, different from bacteria (prokaryotic).