Enter a clue or pattern or both:
The Clue
Certain light sources (6 letter answer)
The Answer
LASERS
Tags
Notes
The answer LASERS is uncommon, appearing about once every 575 puzzles.
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Needs for some games of tag
Definition
LASER as a noun:
1. (laser, optical maser) = an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light