microlepidopteraPronunciation: /ˌmʌɪkrə(ʊ)lɛpɪˈdɒpt(ə)rə/Definition of microlepidoptera noun Entomology the numerous small moths which are of interest only to the specialist collector. Origin:modern Latin (plural), from micro- 'small' + Lepidopteramicrolepidoptera in other Oxford dictionaries Definition of microlepidoptera in the US English dictionary