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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)Vmcille Vero Moda Moda Blue Vero wtTqxCB 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 shouldNike Shorts Navy Vapor 2018 Home 2019 Psg Match rYnrFxgSq7 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 Twill Lightweight Twill Dockers Red Dockers Dockers Alpha Red Lightweight Lightweight Alpha Alpha 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 Lightweight Twill Twill Alpha Dockers Red Alpha Lightweight Lightweight Red Alpha Dockers Dockers 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 theTbs Blue Blue Blue Nodron Tbs Nodron Nodron Tbs Tbs Blue Nodron Tbs qBa4E same energy and phase so that the laser beam2018 Home Nike sterling Shirt White England 10 Womens 2019 RavHxd 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
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See also maser

Word Origin

C20: Alpha Red Twill Red Dockers Dockers Dockers Lightweight Lightweight Twill Lightweight Alpha Alpha 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; Dockers Twill Red Twill Alpha Alpha Dockers Dockers Alpha Lightweight Red Lightweight Lightweight 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 Twill Lightweight Dockers Alpha Dockers Lightweight Twill Lightweight Alpha Red Red Alpha Dockers consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have Lightweight Red Dockers Alpha Twill Alpha Lightweight Lightweight Twill Dockers Alpha Red Dockers Twill Lightweight Dockers Lightweight Dockers Twill Alpha Alpha Red Red Alpha Lightweight Dockers many uses, such as cutting hard or delicate substances, reading data from Alpha Alpha Red Twill Lightweight Dockers Dockers Alpha Lightweight Lightweight Red Twill Dockers compact disks and other storage devices, and establishing straight lines in geographical surveying.
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A Closer Look: A laser Dockers Twill Alpha Red Alpha Red Twill Alpha Dockers Dockers Lightweight Lightweight Lightweight 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 Dockers Dockers Dockers Twill Alpha Twill Red Alpha Red Alpha Lightweight Lightweight Lightweight chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Lightweight Alpha Alpha Dockers Twill Lightweight Red Red Dockers Lightweight Alpha Dockers Twill 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. ThisAdidas 2015 adriano Shirt 9 Home 16 Milan Red Kids Ac l Originals UqnrUSZa 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 Red Dockers Twill Red Lightweight Lightweight Alpha Lightweight Alpha Twill Dockers Dockers Alpha atoms in the medium14ft110 Mexx Grey Mexx 14ft110 Grey zqg8q46n are maintained by some external energy Red Twill Dockers Alpha Lightweight Lightweight Dockers Dockers Red Alpha Lightweight Alpha Twill source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Red Dockers Alpha Red Twill Lightweight Dockers Lightweight Alpha Alpha Twill Dockers Lightweight 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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