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foxfire

(by extension, loosely) Wood exhibiting fungal bioluminescence; torchwood.

ˈfɒksfaɪəDocumented since 2000s2000sGen ZCurrent186 viewsLast reviewed Jun 29, 2026+ Add a definition
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2 definitions
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Born ~2009 · 1 year of recorded use
2009Born2026: 2 citationsToday, 2026
Late-Millennial / Web 2.0 eraSee decade cohort →

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#1·Apr 27, 2026

(by extension, loosely) Wood exhibiting fungal bioluminescence; torchwood.

Perhaps you've seen a foxfire in the woods. Well, in the dark, it looks like a live, burning coal; but when you go to it, and take it up, it's only a piece of rotten wood.
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#2·Apr 27, 2026

(mycology, chiefly, US) Bioluminescence created by some types of fungus, particularly those growing on rotting wood.

The foxfire,—as the country people call it,—glowed hideously from the cold and matted bosom of the marsh; and, far from us, in the depths of darkness, the screech-owl sat upon his perch, brooding over the slimy pool, and whooping out a d…
Origin: [[File:PanellusStipticusAug12 2009.jpg|thumb|A long-exposure photograph of a fungus known as a () in Mount Vernon, Wisconsin, USA, exhibiting foxfire.]] Possibly from , though the semantic connection is unclear. Alternatively, the first element may be ultimately from , or the term may derive by folk etymology from phosphor. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
Heard in the wild
  • “Launching Foxfire Atelier with the first artifact from the Athenaeum. Annotation Ink — a subtle magical tool from The Infinite Library, where even small interactions with a text can carry unexpected weight. This is part of an ongoing item series for the in-world Emporium.”

    — Bluesky· May 2026
  • “Gwen felt a bit drained & Alex helped her to her room. Then Gwen helped herself to some Alex. #GwenFoxFire #FoxFire Family Ties #TheClaimedSaga continues! Amazon: amzn.to/2SSG43H Barnes & Noble: tinyurl.com/foxfire2-BnN iBook: apple.co/2BEMnmW”

    — Bluesky· May 2026
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