1. Small moth-like insect having two pairs of hairy membranous wings and aquatic larvae
   "Fly fishermen often imitate caddis flies in their lure designs";
   - caddis fly
    
2. Larva of the caddis fly; constructs a case of silk covered with sand or plant debris
   "Fly fishermen often imitate caddises in their lure designs"; "The intricate cases built by caddis worms fascinate both scientists and artists";
   - caddisworm, strawworm, caddis worm, caddice
    
3. The aquatic larva of a caddisfly, typically living in a self-made protective case
   "Caddis larvae are often used as fishing bait";
   - caddice
    
4. [archaic] A kind of worsted yarn, lace, or ribbon
   "The historical costume was trimmed with caddis braid";
   - caddice [archaic]

Derived forms: caddises

Type of: caseworm, trichopteran, trichopteron, trichopterous insect

Part of: order Trichoptera, Trichoptera

Encyclopedia: Caddis, Paul