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Noun: rotary wing  row-tu-ree wing
  1. The long airfoil that rotates to provide the lift that supports a helicopter in the air
    "The helicopter's rotary wings whirred loudly as it took off";
    - rotor blade

Derived forms: rotary wings

Type of: aerofoil [Brit], airfoil [N. Amer], control surface, surface

Part of: main rotor

Encyclopedia: Rotary wing