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definition of the word laser

by the Wiktionnary

Abbreviation of “Light Amplification by the Stimulated Emission of Radiation”. Originally called an optical maser.

Wikipedia has an article on:
Laser

Wikipedia

Singular
laser

Plural
lasers

laser (plural lasers)

  1. A device that produces a monochromatic, coherent beam of light.


Definition from Wiktionary
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