Meaning of LASER in English

LASER

/ ˈleɪzə(r); NAmE / noun

a device that makes a very strong line of controlled light (= with rays that are parallel and of the same wavelength ) :

a laser beam

a laser navigation device

The bar codes on the products are read by lasers.

a laser show (= lasers used as entertainment)

She's had laser surgery on her eye.

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WORD ORIGIN

1960s: acronym from light amplification by stimulated emission of radiation , on the pattern of maser .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.