belonging or pertaining to the Lepidoptera, an order of insects comprising the butterflies, moths, and skippers, that in the adult state have four membranous wings more or less covered with small scales.
Also, lepidopteral.

1790–1800; Lepidopter(a) + -ous

nonlepidopteral, adjective
nonlepidopterous, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
They may be reared by collecting lepidopterous and dipterous pupae.
In addition, there is a potential direct risk to non-target lepidopterous
  species, including endangered species.
Fossil lepidopterous leaf mines demonstrate the age of some insect-plant
The use sites are all agricultural for use on growing plants to control
  lepidopterous pests.
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