Kalmar "Infusoria" tana nufin rukuni na ƙananan ƙwayoyin cuta, yawanci kwayoyin halitta unicellular waɗanda aka fi samun su a cikin ruwa mai tsayi ko a hankali, kamar tafkuna da koguna. Infusoria membobi ne na masarautar karuwanci, wanda ya ƙunshi nau'ikan ƙwayoyin cuta na eukaryotic waɗanda ba tsire-tsire ba, dabbobi, ko fungi ba ne. raba wasu halaye. A cikin wannan mahallin, kalmar "Subclass Infusoria" tana nufin wani nau'i na taxonomic na phylum Ciliophora, wanda ya haɗa da nau'i-nau'i iri-iri na protists guda ɗaya waɗanda ke nuna kasancewar cilia, ƙananan sifofi masu kama da gashi waɗanda kwayoyin halitta suke amfani da su don motsi. da kuma ciyarwa.A taƙaice, ƙamus na ma'anar kalmar "Subclass Infusoria" tana nufin ƙungiyar taxonomic na ciliated, microorganisms unicellular microorganisms waɗanda galibi ana samun su a muhallin ruwa.