1. Any of various diurnal moths of the family Sesiidae, having scaleless transparent wings and a wasplike appearance, some of which are pests of crops.
2. Any of various other similar moths, especially of the family Sphingidae.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Animals) any moth of the family Sesiidae (or Aegeriidae), characterized by the absence of scales from the greater part of the wings. They are day-flying and some, such as the hornet clearwing (Sesia apiformis), resemble wasps and other hymenopterans
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any moth of the family Aegeriidae, having transparent, scaleless wings.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.