Octane Meaning
/ˈɒkteɪn/Definition, CEFR level C1, pronunciation, examples, and quiz.
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Definition
nounAny of the eighteen isomeric aliphatic hydrocarbons (C₈H₁₈) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents.
nounoctane number
Sentence Examples
The high-octane fuel was expensive but efficient.
The car required low-octane fuel to run smoothly.
What kind of high-octane are you using in your crystal ball these days, Swami?
CEFR Practice Quiz
The high ____ fuel prevented engine knocking in the race car.
CEFR Practice Quiz (Alternate)
High-performance engines require fuel with a higher ____ rating to prevent knocking.
Word Origin & History
From oct- + -ane.
Explore More C1 Vocabulary Words
CEFR Practice Quiz
The high ____ fuel prevented engine knocking in the race car.
CEFR Practice Quiz (Alternate)
High-performance engines require fuel with a higher ____ rating to prevent knocking.