1. in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter; [syn: Infusoria, subclass Infusoria]
WordNet (r) 3.0 (2006):
subclass Infusoria
n 1: in some recent classifications, coextensive with the
Ciliata: minute organisms found in decomposing infusions of
organic matter [syn: Infusoria, subclass Infusoria]