Dark
Dark adjective - Devoid of or deficient in light or brightness; shadowed or black.
Usage example: dark as the inside of a black cat
Fluorescent is an antonym for dark.
Fluorescent
Fluorescent adjective - Emitting light during exposure to radiation from an external source.
Nearby Word: fluorescence
Both words in one sentence
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In Monster Buster Club, parts of the kids' costumes are fluorescent and give off a Tron Line effect in the dark.
Source: Tron Lines -
The nightmare versions fought as enemies tend to use dark color schemes, while the friendly spirit versions are downright fluorescent.
Source: Amazing Technicolor Wildlife -
Once underneath the dark, cold concrete of the garage with its bleak fluorescent light, I lean against the wall and put my head in my hands.
Source: Not Good with Rejection
Cite this Source
Fluorescent and Dark. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/dark/fluorescent
Dark & Fluorescent. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/dark/fluorescent>.
Fluorescent or Dark. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/dark/fluorescent.
Google Ngram Viewer shows how "dark" and "fluorescent" have occurred on timeline