Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Example Sentences
When the team ran pulses of blue light through the kidney-jellyfish combo, a visible laser beam shot out.
The rod was to work when a beam of light was bounced off its end.
Lasers all work in much the same way: amplifying light into a concentrated beam of a single wavelength or colour.