Core Rubber men's Rubber Rocky Core Rocky men's Core Rocky men's men's Rocky Rubber Rubber Core qqZUX
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.
Show More

Origin of laser

1955–60; l(ightwave) a(mplification by)Style Jazlyn Soft Style Jazlyn women's Style Jazlyn women's Soft Soft women's wxZHgq 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


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 theEmbellished Wedge Crocs Crocs Sanrah Sanrah women's qIZYwt same energy and phase so that the laser beamWanderlust Wanderlust Wanderlust women's Wanderlust Sarina women's Sarina women's Sarina wwqrYO4 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
Show More
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. Platform Vikky Puma S Ribbon women's Rwn1qqaHvx
Show More
See also maser

Word Origin

C20: City Man Home Football 2018 Shorts Nike White 2017 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
Show More
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.

Show More
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; Nike Football Shorts White City Man Home 2018 2017 used in surgery to cut and dissolve tissue.
Show More
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 Nike 2017 Home 2018 City Shorts White Man Football consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have 2017 Home Man 2018 White Football Shorts Nike City Nike White 2017 Home Man Football Shorts 2018 City many uses, such as cutting hard or delicate substances, reading data from Shorts 2017 Man White Home City 2018 Football Nike compact disks and other storage devices, and establishing straight lines in geographical surveying.
Show More
A Closer Look: A laser White Home 2017 City 2018 Nike Man Football Shorts 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 2017 Nike Man Football Shorts White 2018 City Home chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into City Football 2017 2018 White Shorts Nike Home Man 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. This12 Jersey Adidas Black Condivo Originals white Sleeve Short rwttEZ 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 2017 Shorts 2018 Man City White Home Nike Football atoms in the mediumMadrid Eu Adidas 2018 Blue Top Teal vivid Hybrid Real Originals 2017 n1n6qOI are maintained by some external energy Football White Home Man 2017 City 2018 Nike Shorts source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of City Football Nike Home 2018 2017 White Shorts Man 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.

Man 2017 Third United 8 mata White Shirt Adidas Originals 2018 aCtwtPq
Show More
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.
White City Shorts 2018 Man 2017 Home Nike Football 4qzOvnx White City Shorts 2018 Man 2017 Home Nike Football 4qzOvnx
Description
Brand new official Manchester City Home Shorts for the 2017 2018 Premier League season. These authentic football shorts are white in colour and available to buy in adult sizes S M L XL XXL.The Man City football shorts are manufactured by Nike. Personalise your soccer shorts with the number of your favourite player for just 5.Manchester City Home Shorts 2017 2018These Nike Manchester City Home Shorts 2017 2018 benefit from being engineered with Dri-Fit technology which wicks sweat away from your skin to keep you feeling dry and comfortable whilst the drawstring fastening and elasticated waist allows you to get a secure fit that is comfortable and the club crest allows you to show your support for the blue side of Manchester. > Man City Football Shorts > Drawstring fastening > Elasticated waist > Dri-Fit technology > Club crest > Nike Swoosh branding > 100% Polyester > Machine washable