light speed

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Definition

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 299792458 meters per second

Example Sentence

Light speed is approximately 186282 miles per second. Spelled as two words.

Synonyms

speed of light; c; speed at which light travels

Antonyms

speed of sound

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light speed
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