- the aquatic larva of a caddis fly, which constructs a protective case around itself made of silk, sand, stones, etcAlso called: caseworm, strawworm
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 worm
The Caddis-worm does not need to cling to the grasses any longer.
The particular species of Caddis-worm I have chosen is found in muddy-bottomed, stagnant pools crammed with small reeds.
The insect I mean is the caddis-worm, which is to be found sometimes in ponds, and very often in springs of fresh water.Natural History
Ernst H.—Your insect from Colorado answers the description of the caddis-worm.
Every fisherman knows the Caddis-worm, which is the larval form of the Caddis-fly.Old Flies in New Dresses
Charles Edward Walker