cad·dice /ˈkædəs/
  毛線
  Cad·dice, Cad·dis  n.  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.
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