caddis fly

noun
  1. any small mothlike insect of the order Trichoptera, having two pairs of hairy wings and aquatic larvae (caddis worms)

Word Origin for caddis fly

C17: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for caddis fly

Historical Examples of caddis fly