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Light speed

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Light Speed Curriculum
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light speed

noun
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 [syn: speed of light] 
WordNet® 3.0, © 2006 by Princeton University.
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Light Speed Curriculum
40% Off Introductory Discount on New Prices. Free Ship Orders $70+.
NESTLearning.com/Light_Speed
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