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

Drawing on economics and game theory, and using tools that range from fluorescent quantum dots to imaging robots, her lab is probing how fungi and plants conduct their trade. — Quanta Magazine, 15 Oct. 2026

The researchers started by making a single, long protein that contained the protease, the sequence it was designed to target, and a fluorescent protein. — ArsTechnica, 14 Oct. 2026

Later, or earlier, the square reflection of a fluorescent light against the window resembles a rectangular moon floating in a clear blue sky. — David Ehrlich, IndieWire, 12 Oct. 2026

The spa Like the rest of the hotel, the spa has an urban futuristic feel with concrete, hardwood, and fluorescent lighting. — Condé Nast, Condé Nast Traveler, 29 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