silver-Y moth
n (Animals) a brownish noctuid moth, Plusia gamma, having a light Y-shaped marking on each forewing; it migrates in large flocks. Often shortened to: silver-Y
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014