protozoan(redirected from protozoans)
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Related to protozoans: paramecium
pro·to·zo·an(prō′tə-zō′ən) also pro·to·zo·on (-ŏn′)
n. pl. pro·to·zo·ans or pro·to·zo·a (-zō′ə) also pro·to·zo·ons
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.
[From New Latin Prōtozōa, former subkingdom name : proto- + -zōa, pl. of -zōon, -zoon.]
pro′to·zo′an, pro′to·zo′al, pro′to·zo′ic adj.
n, pl -zoa (-ˈzəʊə) or -zoanspl -zoa
(Animals) Also called: protozoon any of various minute unicellular organisms formerly regarded as invertebrates of the phylum Protozoa but now usually classified in certain phyla of protoctists. Protozoans include flagellates, ciliates, sporozoans, amoebas, and foraminifers
(Animals) of or relating to protozoans
[C19: via New Latin from Greek proto- + zōion animal]
pro•to•zo•an(ˌproʊ təˈzoʊ ən)
n., pl. -zo•ans, (esp. collectively) -zo•a (-ˈzoʊ ə)
1. any of various one-celled protist organisms that usu. obtain nourishment by ingesting food particles rather than by photosynthesis: classified as the superphylum Protozoa encompassing separate phyla according to means of movement, as by pseudopod, flagella, or cilia.adj.
2. of, pertaining to, or characteristic of a protozoan.
Any of a large group of one-celled organisms that have a cell nucleus and live in water or as parasites. Many protozoans move about by means of appendages known as cilia or flagella. Protozoans include the amoebas and paramecia and are classified as protists.
A unicellular organism such as an amoeba, belonging to the Protist kingdom.
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|Noun||1.||protozoan - any of diverse minute acellular or unicellular organisms usually nonphotosynthetic|
protoctist - any of the unicellular protists
phylum Protozoa, Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers
arcella - an amoeba-like protozoan with a chitinous shell resembling an umbrella
difflugia - a protozoan with an ovoid shell of cemented sand grains
ciliate, ciliated protozoan, ciliophoran - a protozoan with a microscopic appendage extending from the surface of the cell
euglena - minute single-celled green freshwater organism having a single flagella; often classed as algae
flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore - a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals
plantlike flagellate - unicellular organisms having many characteristics of typical algae
sporozoan - parasitic spore-forming protozoan
cytostome - mouth of a protozoan
|Adj.||1.||protozoan - of or relating to the Protozoa|