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1. (Zoology) any of the microscopic organisms, such as protozoans and rotifers, found in infusions of organic material
2. (Zoology) any member of the subclass Ciliata. See ciliate3
(Zoology) of or relating to infusorians
[C18: from New Latin Infusoria former class name; see infuse]
ˌinfuˈsorial adj


(ˌɪn fyʊˈsɔr i ən, -ˈsoʊr-)

1. any of the Infusoria.
2. infusorial.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.infusorian - any member of the subclass Infusoriainfusorian - any member of the subclass Infusoria
ciliate, ciliated protozoan, ciliophoran - a protozoan with a microscopic appendage extending from the surface of the cell
Infusoria, subclass Infusoria - in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter
References in periodicals archive ?
can see, would it be to an infusorian animalcule--to an intestinal
During its early life history, live diets such as rotifers, infusorians, water fleas (Moina sp.) and mosquito larvae are mainly consumed.
Cultures were made in camera of incubation in conditions controlled with average differentials (seaweed and infusorians).