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1773, "insects with four scaly wings," the biological classification that includes butterflies and moths, coined 1735 in Modern Latin by Swedish botanist Carolus Linnaeus (Karl von Linné, 1707-78) from Gk. lepido-, comb. form of lepis (gen. lepidos) "(fish) scale" (related to lepein "to peel") + pteron "wing, feather" (see petition).