pro·to·zo·an (pr  t -z n) also pro·to·zo·on (- n)n. pl. pro·to·zo·ans or pro·to·zo·a (-z ) also pro·to·zo·ons Any of a large group of single-celled, usually microscopic, eukaryotic organisms, such as amoebas, ciliates, flagellates, and sporozoans. pro to·zoan, proto·zoal, proto·zoic adj. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  Protozoa - in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminiferskingdom Protoctista, Protoctista - in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals protozoan, protozoon - any of diverse minute acellular or unicellular organisms usually nonphotosynthetic class Sarcodina, Sarcodina - characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda Ciliata, Ciliophora, class Ciliata, class Ciliophora - class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle class Sporozoa, Sporozoa - strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites phylum - (biology) the major taxonomic group of animals and plants; contains classes |
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