caddis worm definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the wormlike larva of the caddis fly that usually lives in fresh water in an elongated case made of twigs, grains of sand, etc. cemented together with silk that it secretes: commonly used as bait by anglers
Origin: ; from Old French cadas, floss silk (with reference to the case)
caddis worm definition by American Heritage Dictionary
also caddice wormnoun
The aquatic wormlike larva of the caddis fly, enclosed in a cylindrical case covered with grains of sand, fragments of shell, and other debris.