The Collaborative International Dictionary of English v.0.48:

Caddice \Cad"dice\, Caddis \Cad"dis\, n. [Prov. E. caddy, cadew;
   cf. G. k["o]der bait.] (Zool.)
   The larva of a caddice fly. These larv[ae] 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]

The Collaborative International Dictionary of English v.0.48:

Caddis \Cad"dis\, n. [OE. caddas, Scot. caddis lint, caddes a
   kind of woolen cloth, cf. Gael. cada, cadadh, a kind of
   cloth, cotton, fustian, W. cadas, F. cadis.]
   A kind of worsted lace or ribbon. "Caddises, cambrics,
   lawns." --Shak.
   [1913 Webster] caddis fly