Definition of bastard wing in English:

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bastard wing

noun

A group of small quill feathers on the first digit of a bird’s wing.
Example sentences
  • The alula feather, also called the bastard wing, can be seen at the top center of the photo.
  • At the same time, he made an anatomical study of bird wings, demonstrating that the bastard wing acts as a brake.
  • Both young green and night herons elevate the bastard wing at times as they climb about the trees, but I have never seen them attempt to use it for grasping.

For editors and proofreaders

Syllabification: bas·tard wing

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