iso-octane

noun

Any isomer of octane except the normal, straight-chain one; especially 2,2,4-trimethylpentane.

OriginEnglish octane ← Ancient Greek ῐ̓́σος (ĭ́sos) →
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Meanings

nouniso-octane (plural iso-octanes)

plural iso-octanes

  1. chemistryAny isomer of octane except the normal, straight-chain one; especially 2,2,4-trimethylpentane.

Origin

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Englishoctane
  4. Englishiso-octane

From iso- + octane.

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

Source: iso-octane on Wiktionary, CC BY-SA 4.0.