fluorescence

[ floo-res-uhns, flaw-, floh- ]

/ flʊˈrɛs əns, flɔ-, floʊ- /

SEE SYNONYMS FOR fluorescence ON THESAURUS.COM

noun Physics, Chemistry.

the emission of radiation, especially of visible light, by a substance during exposure to external radiation, as light or x-rays.Compare phosphorescence (def. 1).

the property possessed by a substance capable of such emission.

the radiation so produced.

Origin of fluorescence

1852; fluor(spar) + -escence, on the model of opalescence, in reference to the mineral's newly discovered property

OTHER WORDS FROM fluorescence

non·fluo·res·cence, noun

WORDS THAT MAY BE CONFUSED WITH fluorescence

florescence, fluorescence

Words nearby fluorescence

fluor, fluorapatite, fluorene, fluoresce, fluorescein, fluorescence, fluorescence-activated cell sorter, fluorescent, fluorescent antibody technique, fluorescent antinuclear antibody test, fluorescent lamp

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for fluorescence

Fluorescence is most efficiently excited by the cathode rays of a vacuum tube.
The Nature of Animal Light|E. Newton Harvey
Phosphorescence is exhibited chiefly by solids, fluorescence also by liquids and vapors.
The Nature of Animal Light|E. Newton Harvey
The ultraviolet rays falling upon this screen were transformed into visible rays by the phenomenon of fluorescence.
Artificial Light|M. Luckiesh
Muscarine is isomeric with betain and oxycholin, from which it is separated by its fluorescence and poisonous properties.
Poisons: Their Effects and Detection|Alexander Wynter Blyth

Fluores′cent, having the property of fluorescence; Fluor′ic.
Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)|Various

British Dictionary definitions for fluorescence

fluorescence

/ (ˌflʊəˈrɛsəns) /

noun

physics

the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state
such an emission of photons that ceases as soon as the bombarding radiation is discontinued
such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10 –8 seconds

the radiation emitted as a result of fluorescenceCompare phosphorescence

Word Origin for fluorescence

C19: fluor + -escence (as in opalescence)

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

Cultural definitions for fluorescence

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.

notes for fluorescence

“Black light” depends on fluorescence for its effects.

Medical definitions for fluorescence

fluorescence

[ flu-rĕs′əns, flô- ]

n.

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.

The property of emitting such radiation.

Other words from fluorescence

fluo•res′cent adj.

Scientific definitions for fluorescence

fluorescence

[ flu-rĕs′əns ]

The giving off of light by a substance when it is exposed to electromagnetic radiation, such as visible light or x-rays. As long as electromagnetic radiation continues to bombard the substance, electrons in the fluorescent material become excited but return very quickly to lower energy, giving off light, always of the same frequency. Fluorescent dyes are often used in microscopic imaging, where different dyes can penetrate and illuminate different parts of the sample being examined, helping to distinguish its structures. Compare phosphorescence.

The light produced in this way.

单词	fluorescence
释义	fluorescence [ floo-res-uhns, flaw-, floh- ] / flʊˈrɛs əns, flɔ-, floʊ- / SEE SYNONYMS FOR fluorescence ON THESAURUS.COM noun Physics, Chemistry. the emission of radiation, especially of visible light, by a substance during exposure to external radiation, as light or x-rays.Compare phosphorescence (def. 1). the property possessed by a substance capable of such emission. the radiation so produced. Origin of fluorescence 1852; fluor(spar) + -escence, on the model of opalescence, in reference to the mineral's newly discovered property OTHER WORDS FROM fluorescence non·fluo·res·cence, noun WORDS THAT MAY BE CONFUSED WITH fluorescence florescence, fluorescence Words nearby fluorescence fluor, fluorapatite, fluorene, fluoresce, fluorescein, fluorescence, fluorescence-activated cell sorter, fluorescent, fluorescent antibody technique, fluorescent antinuclear antibody test, fluorescent lamp Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for fluorescence Fluorescence is most efficiently excited by the cathode rays of a vacuum tube. The Nature of Animal Light\|E. Newton Harvey Phosphorescence is exhibited chiefly by solids, fluorescence also by liquids and vapors. The Nature of Animal Light\|E. Newton Harvey The ultraviolet rays falling upon this screen were transformed into visible rays by the phenomenon of fluorescence. Artificial Light\|M. Luckiesh Muscarine is isomeric with betain and oxycholin, from which it is separated by its fluorescence and poisonous properties. Poisons: Their Effects and Detection\|Alexander Wynter Blyth Fluores′cent, having the property of fluorescence; Fluor′ic. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)\|Various British Dictionary definitions for fluorescence fluorescence / (ˌflʊəˈrɛsəns) / noun physics the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state such an emission of photons that ceases as soon as the bombarding radiation is discontinued such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10 –8 seconds the radiation emitted as a result of fluorescenceCompare phosphorescence Word Origin for fluorescence C19: fluor + -escence (as in opalescence) 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 Words related to fluorescence light, glow, brightness, luminance Cultural definitions for fluorescence 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. notes for fluorescence “Black light” depends on fluorescence for its effects. 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. Medical definitions for fluorescence fluorescence [ flu-rĕs′əns, flô- ] n. 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. The property of emitting such radiation. Other words from fluorescence fluo•res′cent adj. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for fluorescence fluorescence [ flu-rĕs′əns ] The giving off of light by a substance when it is exposed to electromagnetic radiation, such as visible light or x-rays. As long as electromagnetic radiation continues to bombard the substance, electrons in the fluorescent material become excited but return very quickly to lower energy, giving off light, always of the same frequency. Fluorescent dyes are often used in microscopic imaging, where different dyes can penetrate and illuminate different parts of the sample being examined, helping to distinguish its structures. Compare phosphorescence. The light produced in this way. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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fluorescence

noun Physics, Chemistry.

Origin of fluorescence

OTHER WORDS FROM fluorescence

WORDS THAT MAY BE CONFUSED WITH fluorescence

Words nearby fluorescence

Example sentences from the Web for fluorescence

British Dictionary definitions for fluorescence

noun

Word Origin for fluorescence

Words related to fluorescence

Cultural definitions for fluorescence

notes for fluorescence

Medical definitions for fluorescence

n.

Other words from fluorescence

Scientific definitions for fluorescence