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light speed (Info)
light speed:- the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second (Princeton WordNet 3.1)
![Light Of Sight [yellow]](/publice/covers_cache_jpg/18/1/6/7/ba55573150167b2c10624e4dbe249d33.gif.jpg "Light Of Sight [yellow]")
