Definition of lepidopteran
: any of a large order (Lepidoptera) of insects comprising the butterflies, moths, and skippers that as adults have four broad or lanceolate wings usually covered with minute overlapping and often brightly colored scales and that as larvae are caterpillars
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Merriam-Webster unabridged
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Time Traveler for lepidopteran
The first known use of lepidopteran was circa 1901
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