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Noun: light unit  lIt yoo-nit
  1. A measure of the visible electromagnetic radiation

Derived forms: light units

Type of: electromagnetic unit, emu

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light reaction
light reflex
light second
light show
light sleep
light source
light speed
light syllable
light time
light touch
light unit
light up
light upon
light welterweight
light whipping cream
Light Within
light year
light-armed
light-blue
light-boned
lightbulb