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phosphor

[fos-fer, -fawr] /ˈfɒs fər, -fɔr/
noun
1.
any of a number of substances that exhibit luminescence when struck by light of certain wavelengths, as by ultraviolet.
2.
Literary. a phosphorescent substance.
adjective
3.
Archaic. phosphorescent.
Origin
1625-1635
1625-35; < French phosphore < Latin Phōsphorus Phosphor

Phosphor

[fos-fer, -fawr] /ˈfɒs fər, -fɔr/
noun
1.
the morning star, especially Venus.
Also, Phosphore
[fos-fawr, -fohr] /ˈfɒs fɔr, -foʊr/ (Show IPA),
Phosphorus.
Origin
1625-35; < Latin Phōsphorus < Greek Phōsphóros the morning star, literally, the light-bringing one, equivalent to phôs light + -phoros bringing; see -phorous

phosphor-

1.
variant of phosphoro- before a vowel:
phosphorate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for phosphor

phosphor

/ˈfɒsfə/
noun
1.
a substance, such as the coating on a cathode-ray tube, capable of emitting light when irradiated with particles or electromagnetic radiation
Word Origin
C17: from French, ultimately from Greek phōsphorosphosphorus
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
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Word Origin and History for phosphor
n.

"morning star," 1630s, from Latin phosphorus "the morning star" (see phosphorus). Meaning "anything phosphorescent" is from 1705.

Online Etymology Dictionary, © 2010 Douglas Harper
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phosphor in Medicine

phosphor- pref.
Variant of phosphoro-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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phosphor in Science
phosphor
  (fŏs'fər)   
Any of various substances that can emit light after absorbing some form of radiation. Television screens and fluorescent lamp tubes are coated on the inside with phosphors. See Note at cathode-ray tube.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for phosphor

solid material that emits light, or luminesces, when exposed to radiation such as ultraviolet light or an electron beam. Hundreds of thousands of phosphors have been synthesized, each one having its own characteristic colour of emission and period of time during which light is emitted after excitation ceases. When certain phosphors luminesce from electron excitation, the process is called electroluminescence, and these phosphors are used in the production of television screens and computer monitors. Phosphors excited by ultraviolet, visible, and infrared radiation are used principally in the so-called fluorescent lamps commonly employed for general illumination

Learn more about phosphor with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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