any of a large order (Lepidoptera) of insects, consisting of the butterflies and moths, characterized by two pairs of broad, membranous wings covered with very fine scales, often brightly colored: the larvae are caterpillars
See lepidopteran in American Heritage Dictionary 4
(lĕpˌĭ-dŏpˈtər-ən)
noun
An insect belonging to the large order Lepidoptera, which includes the butterflies and moths, characterized by four membranous wings covered with small scales.