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radar

radar

 
 
pronunciation:
reI dar
features:
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part of speech: noun
definition 1: the use of radio waves to track the location, distance, and speed of faraway objects. Waves are sent out and then picked up again when they bounce back after hitting some object.
The ship uses radar to detect if there are other ships in the area.
 
definition 2: the equipment used for this method of tracking.
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  airplane, electricity, geology, physics, technology