Dictionary.com
definitions

isooctane

[ahy-soh-ok-teyn]

noun Chemistry.

the octane C8H18, used as one of the standards in establishing the octane number of a fuel.

Nearby words

  1. isonicotinic acid hydrazide,
  2. isonome,
  3. isonomic,
  4. isonomy,
  5. isonzo,
  6. isopach,
  7. isopachous,
  8. isopag,
  9. isopathy,
  10. isopectic
Compare octane number.

Origin of isooctane

First recorded in 1905–10; iso- + octane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for isooctane

isooctane

noun

a colourless liquid alkane hydrocarbon produced from petroleum and used in standardizing petrol. Formula: (CH 3) 3 CCH 2 CH(CH 3) 2See also octane number
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012