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Definitions

fluorescence

[floo-res-uhns, flaw-, floh-] / flʊˈrɛs əns, flɔ-, floʊ- /
NOUN
luminosity
Synonyms
Antonyms
STRONG


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The water-soluble, FDA-approved dye used by UltraGreen.ai for fluorescence imaging is considered a generic drug and falls under the current exemption, they say.

From The Wall Street Journal • Apr. 7, 2026

Emerging portable testing methods include X-ray fluorescence analysers for turmeric and handheld DNA kits to test olive oil.

From BBC • Feb. 9, 2026

"We demonstrated the results of iron stress on phytoplankton out in the ocean, without even bringing back samples to the lab to perform molecular extractions using fluorescence measurements carried out at sea," she said.

From Science Daily • Jan. 12, 2026

“Radioactive decay does not typically produce visible fluorescence, so, no,” wrote Megan Cook of the Australian Radiation Protection and Nuclear Safety Agency in an email.

From Slate • Aug. 21, 2025

As a Ph.D. student, he’d used HeLa to help develop something called fluorescence in situ hybridization, otherwise known as FISH, a technique for painting chromosomes with multicolored fluorescent dyes that shine bright under ultraviolet light.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot