fluorescent

adjective

fluo·​res·​cent flu̇-ˈre-sᵊnt 

flȯ-

1

: having or relating to fluorescence

2

: bright and glowing as a result of fluorescence

fluorescent inks

broadly : very bright in color

fluorescent noun

fluorescently adverb

Examples of fluorescent in a Sentence

Recent Examples on the Web

That rules out many advanced microscopy techniques, particularly those that rely on intense light or fluorescent dyes. — Jennifer Ouellette, ArsTechnica, 18 Sep. 2026

The tissue itself wasn’t a mere appendage to the mouse – further testing using fluorescent labelling and measures of its electrical activity demonstrated that the organoid and its host brain communicated. — Mike McRae 17, New Atlas, 17 Sep. 2026

How Costco became a 'third place' With its fluorescent lighting, concrete floors, and industrial shelving, Costco might seem like an unlikely setting for leisurely socializing. — Jessica Guynn, USA Today, 16 Sep. 2026

However, once in a tree stand elevated at least 10 feet off the ground, bowhunters may remove fluorescent orange clothing, according to DEEP officials. — Stephen Underwood, Hartford Courant, 15 Sep. 2026

Word History

First Known Use

1853, in the meaning defined at sense 1

Phrases Containing fluorescent

• compact fluorescent bulb
• compact fluorescent lamp
• compact fluorescent light
• compact fluorescent light bulb
• fluorescent lamp

Rhymes for fluorescent

• depressant
• incessant
• putrescent
• quiescent
• senescent
• suppressant
• acquiescent
• adolescent
• arborescent
• coalescent
• convalescent
• deliquescent

Kids Definition

fluorescent

adjective

flu·​o·​res·​cent

ˌflu̇(-ə)r-ˈes-ᵊnt

1

: having or relating to fluorescence

2

: very bright in color

fluorescent markers