lep·i·dop·ter·an 
(lĕp′ĭ-dŏptər-ən)
(lĕp′ĭ-dŏptər-ən)n.
Any of numerous insects of the order Lepidoptera, which includes the butterflies and moths, characterized by four membranous wings covered with small scales and having larvae that are called caterpillars.
[From New Latin Lepidoptera, order name : LEPIDO- + Greek ptera, pl. of pteron, wing, winged creature; see -PTER.]
lep′i·dopter·an, lep′i·dopter·ous adj.