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fluorescence

 - 6 dictionary results
Fluorescence Spectroscopy
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fluo⋅res⋅cence

  [floo-res-uhns, flaw-, floh-]
Use fluorescence in a Sentence
–noun Physics, Chemistry.
1. the emission of radiation, esp. of visible light, by a substance during exposure to external radiation, as light or x-rays. Compare phosphorescence (def. 1).
2. the property possessed by a substance capable of such emission.
3. the radiation so produced.
Origin:
1852; fluor(spar) + -escence, on the model of opalescence, in reference to the mineral's newly discovered property
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Fluorescence Spectroscopy
The world's most sensitive Steady-state, Lifetime, TCSPC
www.HORIBA.com/scientific
fluo·res·cence   (flŏŏ-rěs'əns, flô-, flō-)   
n.  

  1. The emission of electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued.

  2. The property of emitting such radiation.

  3. The radiation so emitted.


[fluor(spar) + -escence.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

fluorescence

The emission of light from an object as a result of bombardment by other kinds of electromagnetic radiation, such as x-rays or ultraviolet rays. Fluorescent materials may appear one color when bathed in visible light and another color when exposed to other kinds of electromagnetic radiation.

Note: “Black light” depends on fluorescence for its effects.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

fluorescence 
1852, "glowing in ultraviolet light," coined by Eng. mathematician and physicist Sir George G. Stokes (1819-1903) from fluorspar (see fluorine), because in it he first noticed the phenomenon, + ending -escence from opalescence, phosphorescence. The fluorescent electric lamp patent was applied for in 1896 by Thomas A. Edison, but such lights were rare before 1938.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: flu·o·res·cence
Pronunciation: -'es-&n(t)s
Function: noun
: luminescence that is caused by the absorption ofradiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost immediately when the incident radiation stops; also : theradiation emitted —flu·o·res·cent /-'es-&nt/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

fluorescence fluo·res·cence (fl&oobreve;-rěs'əns, flô-)
n.

  1. The emission of electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued.

  2. The property of emitting such radiation.

fluo·res'cent adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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