Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

See What's Trending Now See More Trending Words

fluorescence

play
noun fluo·res·cence \ flu̇-ˈre-sᵊn(t)s , flȯ- \

Definition of fluorescence

:luminescence that is caused by the absorption of radiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost at once when the incident radiation stops; also :the radiation emitted — compare phosphorescence

See fluorescence defined for kids

Explore Merriam-Webster

alt-59c448f88ea38
Trending: Kim Jong Un: Trump a 'Dotard'
video-title-words-of-the-year-1066
Words of the Year: 1066
alt-59c52d6ee2f72
Breathing Life Into 'Inspire'
image1644821030
These Are Fighting Words

Examples of fluorescence in a Sentence

  1. studied the fluorescence of certain elements

Recent Examples of fluorescence from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluorescence.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of fluorescence

fluorspar + opalescence

fluorescence Synonyms

Synonyms
blaze, flare, light, glare, gleam, glow, illumination, incandescence, luminescence, radiance, shine
Related Words
flash, glimmer, glint, glitter, scintillation, shimmer, sparkle, twinkle; daylight, moonlight, sunlight, sunshine; afterglow, aureole (or aureola), aurora, beam, halo, ray, shaft, streak, stream, sunbeam; glisten, gloss, luster (or lustre), polish, reflection, sheen
Near Antonyms
blackness, dark, darkness, dimness, dusk, duskiness, gloom, night, shadow

Medical Dictionary

fluorescence

play
noun flu·o·res·cence \ -ˈes-ᵊn(t)s \

medical Definition of fluorescence

:luminescence that is caused by the absorption of radiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost immediately when the incident radiation stops; also :the radiation emitted
—

fluorescent

play \-ˈes-ᵊnt\ adjective
—

fluorescently

adverb

Learn More about fluorescence

  1. Thesaurus: All synonyms and antonyms for fluorescence Spanish Central: Translation of fluorescence Nglish: Translation of fluorescence for Spanish speakers Britannica.com: Encyclopedia article about fluorescence

Seen and Heard

What made you want to look up fluorescence? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

yeasty

play

of yeast or being unsettled or frivolous

Get Word of the Day daily email!

TRENDING NOW

  1. dotage, dotard a state or period of senile decay

  2. otherwise "in other respects"

  3. federalism Graham says bill gives power to states

  4. bodega "Don’t mess with the beloved bodega."

  5. carceral Of, relating to, or suggesting a jail or prison

SEE ALL

BROWSE DICTIONARY

fluorescence

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

alt-59c52d6ee2f72
Breathing Life Into 'Inspire'

The word's origins are quite literal

alt-59c4207ecf106
Let's Talk 'Tea'

Spill it, sip it: just make it hot.

image1644821030
8 Words and Phrases from Boxing and Wrestling

Common terms that come from boxing and wrestling

alt-59c2960017c94
The Ambiguity of Pushing 'Up' and 'Back'

When you push a meeting, where does it go?

Ask the Editors

video-title-words-of-the-year-1066
Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

payday
How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

young-plant-shoots
Merriam-Webster's New Words Quiz—Fall 2017 Edition!

You're going to have to memorize the dictionary again.

Take the quiz
stylized-drawing-of-woman-pole-vaulting-across-gap-to-get-trophy
Challenging Vocabulary Quiz Returns!

No tricks, just difficult words.

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
Dictionary Devil
Dictionary Devil

The dictionary has been scrambled—can you put it back together?

Play the game
Examples: fluorescence in a Sentence