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• n  in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter

• Cryogenic (low-temperature) experimenters have known for some time that certain living cells, dry or nearly dry such as spores, infusoria, some types of bacteriacan survive.
• Cryogenic (low-temperature) experimenters have known for some time that certain living cells, dry or nearly dry such as spores, infusoria, some types of bacteriacan survive.

• Infusoria
• subclass Infusoria