isooctane

[ ahy-soh-ok-teyn ]
/ ˌaɪ soʊˈɒk teɪn /

noun Chemistry.

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

Origin of isooctane

First recorded in 1905–10; iso- + octane

British Dictionary definitions for isooctane

isooctane
/ (ˌaɪsəʊˈɒkteɪn) /

noun

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