(Zool.), a small mothlike species of trichopterous insect, whose larva is the caddice; it has two pairs of hairy membranous wings and aquatic larvae. [ 1913 Webster + WordNet 1.5 ]

{ } n. [ Prov. E. caddy, cadew; cf. G. köder bait. ] (Zool.) The larva of a caddice fly. These larvæ generally live in cylindrical cases, open at each end, and covered externally with pieces of broken shells, gravel, bits of wood, etc. They are a favorite bait with anglers. Called also caddice worm, or caddis worm. [ 1913 Webster ]