Etymology

isooctane

I1S1O1O1C3T1A1N1E1

Today it means: any isomer of n-octane; especially 2,2,4-trimethylpentane, used as a reference in the determination of the octane number of fuel Full definition →

English octane ← Ancient Greek ῐ̓́σος (ĭ́sos)
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The story

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

From iso- + octane.

Etymology from Wiktionary, CC BY-SA 4.0.