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budworm

[buhd-wurm]
noun
  1. any of several lepidopterous larvae, especially the spruce budworm, that attack the buds of plants.
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Origin of budworm

An Americanism dating back to 1840–50; bud1 + worm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018