la·ser
(lā′zər)n.
1.
a. Any of several devices that emit highly amplified and coherent radiation of one or more discrete wavelengths. One of the most common lasers makes use of atoms in a metastable energy state, which, as they decay to a lower energy level, stimulate others to decay, resulting in a cascade of emitted radiation.
b. A beam of radiation emitted by a laser.
2. Sports A ball or puck sent in a straight line at high speed: shot a laser into the upper right corner of the goal.
[l(ight) a(mplification by) s(timulated) e(mission of) r(adiation).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
laser
(ˈleɪzə)n
1. (General Physics) 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 the same energy and phase so that the laser beam is monochromatic and coherent, allowing it to be brought to a fine focus
2. (General Physics) any similar source producing a beam of any electromagnetic radiation, such as infrared or microwave radiation
vb (tr)
3. to use a laser on (something), esp as part of medical treatment
4. (often foll by off) to remove (a tattoo, fat, etc) with laser treatment
[C20: from light amplification by stimulated emission of radiation]
Laser
(ˈleɪzə)n
trademark a type of dinghy, designed to be sailed by one person
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
la•ser
(ˈleɪ zər)n.
a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms and causing them to radiate their energy in phase.
Compare maser. [1955–60; l(ightwave) a(mplification by) s(timulated) e(mission of) r(adiation)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
la·ser
(lā′zər) A device that emits a very narrow and intense beam of light or other radiation. The light is generated by exciting the atoms of a medium, such as a crystal, gas, or liquid. The color of laser light depends on the level to which the atoms of the medium become excited. Lasers are used for many purposes, such as cutting hard substances and destroying diseased tissue.
Did You Know? A laser emits a thin, intense beam of light that can travel long distances without diffusing or spreading out very much. Almost any light beam consists of many waves traveling in roughly the same direction. In laser light, the waves are all precisely in step with each other. Such light is called coherent. Lasers produce coherent light through a process called stimulated emission. The laser contains a chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited to a high energy level. When a light wave of the correct frequency is sent through the chamber from an electronic flash tube, it makes the excited atoms emit light that is in step with the original wave. These waves then stimulate other atoms to emit more coherent light. The chamber has mirrors at both ends, so the light travels back and forth, repeatedly stimulating emission. One of the mirrors is partially transparent so that the laser beam can exit from that end.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
laser
Any device that can produce or amplify optical radiation primarily by the process of controlled stimulated emission. A laser may emit electromagnetic radiation from the ultraviolet portion of the spectrum through the infrared portion. Also, an acronym for "light amplification by stimulated emission of radiation."
Dictionary of Military and Associated Terms. US Department of Defense 2005.
ThesaurusAntonymsRelated WordsSynonymsLegend:
| Noun | 1. |  laser - an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent lightoptical device - a device for producing or controlling light photocoagulator - surgical instrument containing a laser for use in photocoagulation |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
أشِعَّة ليزرلِيّزَرْ
laserlaserový
laserlaser-
laser
laser
lézer
leysigeislileysirleysir, leysigeisli
レーザー
레이저
lazerinis spausdintuvaslazeris
lāzera-lāzers
laser
laserlaserový
laser
laser
แสงเลเซอร์
la-delaser
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
laser
laser
in cpds → Laser-;laser beam
n → Laserstrahl m
laser disc
n → Laserdisc f, → Laserdisk f
laser gun
n → Laserkanone f → or -pistole f
laser medicine
n → Lasermedizin f
laser printer
n → Laserdrucker m
laser show
n → Lasershow f
laser surgery
n → Laserchirurgie f
laser technology
n → Lasertechnik f
laser weapon
n → Laserwaffe f
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
laser
(ˈleizə) noun (an instrument that produces) a narrow and very intense beam of light. The men were cutting the sheets of metal with a laser; (also adjective) a laser beam.
ˈlaser printer nounKernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
laser
→ لِيّزَرْ laser laser Laser λέιζερ láser laser laser laser laser レーザー 레이저 laser laser laser laser лазер laser แสงเลเซอร์ lazer laser 激光Multilingual Translator © HarperCollins Publishers 2009
la·ser
n. laser.
1. sigla del inglés “Light Amplification by Stimulated Emission of Radiation” (amplificación de la luz por estimulación de emisión de radiación);
2. bisturí microquirúrgico usado en la cauterización de tumores.
English-Spanish Medical Dictionary © Farlex 2012
laser
n láser mEnglish-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.