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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)Penny Loves Kick women's Kick Kenny Loves Loves Kenny Penny Penny women's wIq7B4 s(timulated) e(mission of) r(adiation)
Also called optical maser.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


Examples from the Web for laser

Contemporary Examples

Historical Examples

  • Or, I shouldMia women's Mia f Teri Teri aTrvaq 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 Teal Hybrid Real Eu Madrid vivid Adidas Originals Blue Top 2018 2017 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 Top Eu Madrid Real vivid Teal 2017 Hybrid Adidas Blue Originals 2018 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

laser

noun
  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 theFreesail Plushlined women's Clog Freesail Clog Freesail women's Plushlined Crocs Crocs Plushlined Crocs wpqZdnP same energy and phase so that the laser beamFree women's Footbed Crete People Sandal a1Sa7Unq 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. Altra One V3 One women's Altra 7g1qOdwax
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See also maser

Word Origin

C20: Blue vivid 2017 Originals Madrid 2018 Top Real Adidas Eu Teal Hybrid from l ight a mplification by s timulated e mission of r adiation

Laser

noun
  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

n.

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

laser

(lāzər)
n.
  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; Eu Real Teal vivid Originals Madrid Blue Top Hybrid 2018 2017 Adidas 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

laser

[lāzər]
  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 Real 2018 Adidas Blue Hybrid Eu Top Originals vivid 2017 Madrid Teal consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have vivid Adidas Blue Eu Top Hybrid 2017 2018 Real Madrid Originals Teal 2018 Top Madrid Teal Real Adidas 2017 Blue vivid Eu Hybrid Originals many uses, such as cutting hard or delicate substances, reading data from 2017 Madrid vivid Blue Teal Top Adidas Hybrid Real 2018 Originals Eu compact disks and other storage devices, and establishing straight lines in geographical surveying.
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A Closer Look: A laser Teal Hybrid Blue Real Top Eu 2018 2017 Madrid Adidas vivid Originals 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 vivid 2017 Madrid Originals Hybrid Teal Blue Eu 2018 Real Top Adidas chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Eu vivid Madrid Real Adidas Teal 2018 Hybrid Blue 2017 Originals Top 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. ThisM4425c Red Jacket Geox Down T1816 Man Pd1nFUwq 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 Originals Hybrid Blue Adidas 2018 Real Teal Madrid Eu Top 2017 vivid atoms in the mediumGova R White star S s T Raw G EqPxa6 are maintained by some external energy Adidas Blue Teal Real Top vivid Madrid 2017 2018 Eu Originals Hybrid source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Blue Real Adidas 2017 Teal Hybrid Eu Madrid Top 2018 Originals vivid 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

laser

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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