"armyworms" in the noun sense
1. armyworm, army worm, Pseudaletia unipuncta
noctuid moth larvae that travel in multitudes destroying especially grass and grain
2. armyworm, Pseudaletia unipuncta
moth whose destructive larvae travel in multitudes
3. armyworm
larva of fungus gnat that feed on cereals and other grains they march in large companies in regular order when the food is exhausted
Source: WordNet® (An amazing lexical database of English)
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