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Definition of Lightlike
1. Adjective. (mathematics) (''of a four-vector'') having a space component whose magnitude is equal to its time component multiplied by the speed of light ¹
¹ Source: wiktionary.com
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1. Adjective. (mathematics) (''of a four-vector'') having a space component whose magnitude is equal to its time component multiplied by the speed of light ¹
¹ Source: wiktionary.com