infusoria

listen to the pronunciation of infusoria
Английский Язык - Английский Язык
the many minute aquatic creatures, such as protozoa and unicellular algae found in fresh water habitats
in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter
One of the classes of Protozoa, including a large number of species, all of minute size
{i} class of one-celled organisms (Zoology)