anglewing

[ang-guh l-wing]
noun
  1. any of several nymphalid butterflies, especially of the genus Polygonia, having angular notches on the outer edges of the forewings.

Origin of anglewing

An Americanism dating back to 1900–05; angle1 + wing
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018