helicopter

A helicopter is a flying vehicle with a system of rotors that lift and propel it. In some cities, police officers patrol in helicopters. In some suburbs, wealthy people even commute by helicopter.

Like airplanes, helicopters travel through the air — but unlike airplanes, they don't have wings. Most helicopters have a large rotor blade on top that creates lift by spinning rapidly. Smaller rotors help the helicopter move and steer. Hospitals use helicopters for transporting patients in crisis, for whom an ambulance might not move fast enough. The word comes from Greek roots, helix, "spiral," and pteron, "wing."

Definitions of helicopter
  1. noun
    an aircraft without wings that obtains its lift from the rotation of overhead blades
    synonyms: chopper, eggbeater, whirlybird
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    types:
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    cargo helicopter
    a helicopter that carries cargo
    shuttle helicopter
    a helicopter that shuttles back and forth
    single-rotor helicopter
    a helicopter having a single rotor
    skyhook
    helicopter carrying a reel of steel cable that can be used to lift and transport heavy objects
    type of:
    heavier-than-air craft
    a non-buoyant aircraft that requires a source of power to hold it aloft and to propel it
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