One of the mysteries of the English language finally explained.
1Any of various small moths of the genera Acleris and Phtheochroa (family Tortricidae) which have a fringe of long scales on the edge of the wing (now rare); also "rough-wing tortrix".
2North American= "rough-winged swallow".
Early 19th century; earliest use found in George Samouelle (d. 1846).
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