Breadcrumb Home > Dictionary > Index I isooctane: Meaning and Definition of Find definitions for: i•so•oc•tane Pronunciation: (ī"sō-ok'tān), [key] — n. Chem. the octane CH, used as one of the standards in establishing the octane number of a fuel. Cf. octane number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Isonzo iso-osmotic TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: bildungsroman Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language