Porifera Syllabification: (Po·rif·er·a)Pronunciation: /pəˈrifərə/ ZoologyDefinition of Porifera a phylum of aquatic invertebrate animals that comprises the sponges. Origin:modern Latin (plural), from Latin porus 'pore' + -fer 'bearing'Porifera in other Oxford dictionaries Definition of Porifera in the British & World English dictionary