the caterpillar of any of several noctuid moths, which feeds at night on the stems of young plants, cutting them off at the ground.

1800–10; cut + worm Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cutworm (ˈkʌtˌwɜːm)
the caterpillar of various noctuid moths, esp those of the genus Argrotis, which is a pest of young crop plants in North America

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
On a talus slope below it the team sets up a trap for army cutworm moths, strong fliers with abdomens the size of jelly beans.
Cutworm infestations are already started by the time corn is planted.
The fastest-spreading species are two cutworm moths.
Flea beetles, as well as cutworm populations, can be reduced by cleaning up the garden area.
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