Lightlike

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    (of a four-vector) Having a space component whose magnitude is equal to its time component multiplied by the speed of light.

Etymology

From light + -like.

Related phrases

speed of light

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.