oc‧tane /ˈɒkteɪn $ ˈɑːk-/
noun [uncountable][
Date: 1800-1900;
Language: Latin;
Origin: octo 'eight'; because it has eight carbon atoms]
a type of
hydrocarbon that is in
fuel and is used as a measure of its quality:
low octane petrol high octane fuel [TahlilGaran] Dictionary of Contemporary English ▲