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Noun: whirlybird  'wur-lee,burd
Usage: N. Amer, informal
  1. An aircraft without wings that obtains its lift from the rotation of overhead blades
    - helicopter, chopper [informal], eggbeater [N. Amer, informal], copter [informal]

Derived forms: whirlybirds

Type of: heavier-than-air craft

Encyclopedia: Whirlybird