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Device Using Light Rays

We've checked our database and believe the answer is LASER which was last seen in the New York Times NYT crossword.
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We think the answer to this crossword clue is: LASER

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LettersAnswerClue
99%5Exact Match!
noun

• an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light

44%12 Treatment using x-rays, gamma rays or subatomic particles
noun

• (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

36%10Device for sending messages, using a mirror and the sun's rays
noun

• an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

verb

• signal by means of a mirror and the using the sun's rays

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Clue Last Found In...

Source #Number Answer
New York Times23 Jan 1983 Down 58
New York Times22 Aug 1980 Down 5
New York Times05 Aug 1978 Down 38
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