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noun Physics.
  1. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase.
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Origin of laser

1955–60; l(ightwave) a(mplification by)Dry university Training Shirt Pre 2018 Barcelona Gold Nike match 2017 vqgXgWA s(timulated) e(mission of) r(adiation)
Also called optical maser. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for laser

Contemporary Examples

Historical Examples

  • Or, I shouldMoony Black Moony Mood Esteve Mood IzwIfOqx say, the thing that is supposed to look like a laser component.

    The Foreign Hand Tie

    Gordon Randall Garrett

  • Therefore, he and his men were in Cerises Jogg Blue Des Le 711 Temps Black absolute control of the men who controlled the laser.

    Where I Wasn't Going

    Walt Richmond

  • He handed the theodolite telescope and the laser milling-head to Paul.

    Where I Wasn't Going

    Walt Richmond

  • The earth shook and a great Des Blue Cerises Temps 711 Jogg Le Black cloud of dust arose from the site, momentarily hiding the laser units.

    The Thirst Quenchers

    Rick Raphael

  • The laser operator fired and the light beam shot down into the earth, burning a narrow hole.

    The Thirst Quenchers

    Rick Raphael

British Dictionary definitions for laser


  1. a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium. The photons involved in the emission process all have theBlue Cream Cream Blue Cream Gry Gry Denm Denm UZ1q0r14W same energy and phase so that the laser beamShort Mom Blue Short Short Clear Mom Lee Clear Lee Mom Blue Lee Clear Blue 6qvtR8wfnf is monochromatic and coherent, allowing it to be brought to a fine focus
  2. any similar source producing a beam of any electromagnetic radiation, such as infrared or microwave radiation
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verb (tr)
  1. to use a laser on (something), esp as part of medical treatment
  2. (often foll by off) to remove (a tattoo, fat, etc) with laser treatment
  3. Brown Jacket Geox Women Down T2163 W4425q qWxnwRBF
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See also maser

Word Origin

C20: Le Blue 711 Cerises Temps Jogg Des Black from l ight a mplification by s timulated e mission of r adiation


  1. trademark a type of dinghy, designed to be sailed by one person
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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

Word Origin and History for laser


1960, acronym for "light amplification by stimulated emission of radiation," on pattern of 1955 MASER. A corresponding verb, lase, was coined 1962.

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Online Etymology Dictionary, © 2010 Douglas Harper

laser in Medicine


  1. Any of several devices that convert incident electromagnetic radiation of mixed frequencies to discrete frequencies of highly amplified and coherent ultraviolet, visible, or infrared radiation; Le Jogg Temps 711 Cerises Des Black Blue used in surgery to cut and dissolve tissue.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

laser in Science


  1. Short for light amplification by stimulated emission of radiation. A device that creates and amplifies electromagnetic radiation of a specific frequency through the process of stimulated emission. The radiation emitted by a laser Le Temps Des Black Jogg 711 Blue Cerises consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have Jogg Blue Temps 711 Black Des Le Cerises Temps Blue Des 711 Black Jogg Le Cerises many uses, such as cutting hard or delicate substances, reading data from Jogg Cerises Blue Temps 711 Des Le Black compact disks and other storage devices, and establishing straight lines in geographical surveying.
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A Closer Look: A laser Temps Black 711 Des Cerises Jogg Blue Le emits a thin, intense beam of nearly monochromatic visible or infrared light that can travel long distances without diffusing. Most light beams consist of many waves traveling in roughly the same direction, but the phases and polarizations of each individual wave (or photon) are randomly distributed. In laser light, the waves are all precisely in step, or in phase, with each other, and have the same polarization. Such light is called coherent. All of the photons that make up a laser beam are in the same quantum state. Lasers produce coherent light through a process called stimulated emission. The laser contains a Jogg Temps 711 Cerises Blue Le Black Des chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Jogg 711 Black Le Blue Temps Cerises Des higher orbits with higher energy states. When one of these electrons jumps down to a lower energy state (which can happen spontaneously), it gives off its extra energy as a photon with a specific frequency. But this photon, upon encountering another atom with an excited electron, will stimulate that electron to jump down as well, emitting another photon with the same frequency as the first and in phase with it. ThisAway Shirt 2017 White Adidas 2016 Originals Spain Football 4I6U6wq effect cascades through the chamber, constantly stimulating other atoms to emit yet more coherent photons. Mirrors at both ends of the chamber cause the light to bounce back and forth in the chamber, sweeping across the entire medium. If a sufficient number of Jogg Des Temps 711 Blue Cerises Black Le atoms in the medium2019 Red Nike 9 Home 2018 eder Shirt Football Portugal q4xUAwn45 are maintained by some external energy Des 711 Blue Black Jogg Cerises Le Temps source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Le Blue 711 Black Temps Des Jogg Cerises coherent photons develops. One of the mirrors is partially transparent, allowing the laser beam to exit from that end of the chamber. Lasers have many industrial, military, and scientific uses, including welding, target detection, microscopic photography, fiber optics, surgery, and optical instrumentation for surveying.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

laser in Culture


A device that produces a very narrow, highly concentrated beam of light. Lasers have a variety of uses in such areas as surgery, welding and metal cutting, and sound and video recording and reproduction. The name is an acronym for light amplification by stimulated emission of radiation.

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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