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cad·dis·flyalso caddis fly (kăd′ĭs-flī′)
Any of numerous insects of the order Trichoptera, having long antennae and four wings covered with short hairs, and usually found near lakes and streams. Also called trichopteran.
[Perhaps from obsolete cad (influenced by caddis), variant of cod (from the tube in which the larva lives).]
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 small mothlike insect of the order Trichoptera, having two pairs of hairy wings and aquatic larvae (caddisworms)
[C17: of unknown origin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or cad•dice•fly(ˈkæd ɪsˌflaɪ)
n., pl. -flies.
any of numerous aquatic insects constituting the order Trichoptera, having two pairs of membranous, often hairy wings and superficially resembling moths.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.