[ mey-zer ]
/ ˈmeɪ zər /
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a device for amplifying electromagnetic waves by stimulated emission of radiation.



In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
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The rainy weather could not ________ my elated spirits on my graduation day.
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Origin of maser

1950–55; m(icrowave)a(mplification by)s(timulated)e(mission of) r(adiation)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
  • "Don't try and buff me, dinAlt," the maser barrel pushed harder against his back.

    The Ethical Engineer|Henry Maxwell Dempsey
  • Rhazes quoted Maser Djawah freely and evidently trusted his declarations implicitly.

  • The mazer-bowls were made from maple-wood, so named from the German Maser, a spotted wood.

    Cups and their Customs|George Edwin Roberts
  • The large, flanged mouth of the maser-projector ground into the small of his back.

    The Ethical Engineer|Henry Maxwell Dempsey

British Dictionary definitions for maser

/ (ˈmeɪzə) /


a device for amplifying microwaves, working on the same principle as a laser
C20: m (icrowave) a (mplification by) s (timulated) e (mission of) r (adiation)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for maser

[ māzər ]

Short for microwave amplification by stimulated emission of radiation. A device that generates coherent microwaves using the same principles as a laser. Masers are used in a variety of applications, including in atomic clocks. Natural masers are found in outer space when water or other substances are excited by radiation from a star or by the energy of a collision.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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