armyworm
Americannoun
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the larva of the noctuid moth Pseudaletia unipuncta, which advances over a region in massive numbers, suggestive of an army, destroying crops of grain and vegetables.
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any moth larva that is similar to the noctuid Pseudaletia unipuncta in its habit of advancing over a region in massive numbers, suggestive of an army, destroying agricultural crops.
Etymology
Origin of armyworm
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
