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单词 helicopter
释义
helicopter
(once / 1069 pages)
n

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."
WORD FAMILY
helicopter: helicopters
USAGE EXAMPLES
Previous searches aided by a bloodhound and a helicopter didn’t turn up any clues.
Washington Times(Jan 02, 2017)
Denver-area police agencies and volunteers searched for David on Saturday night and New Year’s Day with the help of a helicopter and a bloodhound.
Seattle Times(Jan 02, 2017)
A medical helicopter landed on the highway, but emergency workers couldn’t stabilize him.
Washington Times(Jan 02, 2017)
n an aircraft without wings that obtains its lift from the rotation of overhead blades
Syn|Hypo|Hyper
chopper, eggbeater, whirlybird
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
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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更新时间:2024/12/23 21:05:43