isooctane

[ ahy-soh-ok-teyn ]

noun

, Chemistry.

1. the octane C 8 H 18 , used as one of the standards in establishing the octane number of a fuel.

isooctane

/ ˌaɪsəʊˈɒkteɪn /

noun

1. See octane number
   a colourless liquid alkane hydrocarbon produced from petroleum and used in standardizing petrol. Formula: (CH 3 ) 3 CCH 2 CH(CH 3 ) 2 See also octane number

Word History and Origins

Origin of isooctane¹

First recorded in 1905–10; iso- + octane