Rotifera Syllabification: (Ro·tif·er·a)Pronunciation: /rōˈtifərə/ ZoologyDefinition of Rotifera a small phylum of minute multicellular aquatic animals that have a characteristic wheellike 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 British & World English dictionary