fluoro

F4L1U1O1R1O1

noun

A fluorescent light.

OriginEnglish oh ← Middle English o ← Old French oh →
UncommonScrabble 9
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Meanings

nounfluoro (plural fluoros)

plural fluoros

  1. AustraliacolloquialA fluorescent light.

    About one in 20 epilepsy sufferers are sensitive to flashing lights, which can include strobe lighting or flickering fluoros[…].

    2009 January 25, Dr Cindy Pan, “Living with epilepsy”, in Herald Sun
    1 more example

    She held her grey felt hat in her hand, slapping the flat brim lightly against her leg as she walked, her tinted hair gleaming under the fluoros.

    2002, Alex Miller, Journey to the Stone Country, Allen & Unwin, published 2003, page 27
adjectivefluoro (comparative more fluoro, superlative most fluoro)

comparative more fluoro · superlative most fluoro

  1. AustraliaNew ZealandFluorescent.

    And yes, as he peers beyond a boulder, down in the hollow he can make out two figures in khaki moving around a fluoro orange tent.

    1999, Julia Leigh, The Hunter, Faber & Faber 2012, p. 150

Origin

  1. Proto-Indo-European*bʰel-
  2. Proto-Indo-European*bʰlewH-
  3. Proto-Indo-European*bʰluH-yé-ti?
  4. Latinfluō
  5. Latinfluor
  6. Englishfluor
  7. Englishfluorite
  8. Middle Low Germanspar
  9. Old Englishspærstān
  10. Middle Englishsparston
  11. Englishsparstonebf.
  12. Englishspar
  13. Englishfluorspar
  14. Englishfluorescencebf.
  15. Englishfluoresce
  16. Englishfluor(escent)
  17. Latinō
  18. Old Frenchoh
  19. Middle Englisho
  20. EnglishO
  21. Middle Englisho
  22. Englishoh
  23. Englishfluoro

From fluor(escent) + -o.

Full word history & related roots →
Cite this entry
APA

fluoro. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/fluoro

MLA

“fluoro.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fluoro. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “fluoro,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/fluoro.

Source: fluoro on Wiktionary, CC BY-SA 4.0.