RotiferaPronunciation: /rəʊˈtɪf(ə)rə/Definition of Rotifera noun Zoology a small phylum of minute multicellular aquatic animals which have a characteristic wheel-like ciliated organ used in swimming and feeding. Origin:modern Latin (plural), from Latin rota 'wheel' + ferre 'to bear'Rotifera in other Oxford dictionaries Definition of Rotifera in the US English dictionary