Definition of armyworm
: any of numerous moths whose larvae travel in multitudes from field to field destroying grass, grain, and other crops; especially : the common armyworm (Pseudaletia unipuncta) of the eastern and central U.S. and Canada
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1815
First Known Use of armyworm
1815
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See words that rhyme with armyworm Britannica.com: Encyclopedia article about armyworm
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