neuropteran Syllabification: (neu·rop·ter·an)Pronunciation: /n(y)o͝oˈräptərən/ EntomologyDefinition of neuropteran noun a predatory flying insect of the order Neuroptera, such as a lacewing or alderfly. adjective relating to or denoting neuropterans. Derivatives neuropterousPronunciation: /-rəs/ adjective neuropteran in other Oxford dictionaries Definition of neuropteran in the British & World English dictionary