armyworm
ar·my·worm
noun
2.
moth whose destructive larvae travel in multitudes
Origin
From army + worm.
Related words
Broader terms
Parts
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.