The Collaborative International Dictionary of English v.0.48:
Strawworm \Straw"worm`\, n. A caddice worm. [1913 Webster]WordNet (r) 3.0 (2006):
strawworm n 1: larva of the caddis fly; constructs a case of silk covered with sand or plant debris [syn: caddisworm, strawworm] 2: larva of chalcid flies injurious to the straw of wheat and other grains [syn: strawworm, jointworm]