isoindene

I1S1O1I1N1D2E1N1E1

noun

A flammable polycyclic hydrocarbon with the chemical formula C₉H₈, composed of a cyclohexadiene ring fused with a cyclopentadiene ring.

OriginEnglish indene ← Dutch indigo ← Spanish índigo →
Scrabble 10
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Meanings

nounisoindene (usually uncountable, plural isoindenes)

plural isoindenes

  1. uncountableusuallychemistryA flammable polycyclic hydrocarbon with the chemical formula C₉H₈, composed of a cyclohexadiene ring fused with a cyclopentadiene ring.

Origin

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Proto-Indo-Iranian*síndʰuš
  4. Sanskritसिन्धु॑ (síndhu)
  5. Old Persian𐏃𐎡𐎯𐎢𐏁 (hiⁿdūš)
  6. Ancient GreekἸνδός (Indós)
  7. Ancient GreekἸνδία (Indía)
  8. Ancient GreekἸνδικός (Indikós)
  9. LatinIndicu
  10. Spanishíndico
  11. Spanishíndigo
  12. Portugueseendego
  13. Spanishíndigo
  14. Dutchindigo
  15. Englishind(igo)
  16. Englishindene
  17. Englishisoindene

From iso- + indene.

Full word history & related roots →
Cite this entry
APA

isoindene. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/isoindene

MLA

“isoindene.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/isoindene. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “isoindene,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/isoindene.

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