bastard wing definition

  • noun:
    • See alula.
    • A tuft of feathers borne because of the bony thumb-like structure in a bird's wing; alula.
    • tuft of little stiff feathers regarding very first digit of a bird's wing
  • adjective:
    • 3 to 5 quill feathers on a tiny joint corresponding towards thumb in a few mammalia; the alula.

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