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octane
This term functions primarily in technical and chemical contexts to describe a specific hydrocarbon. When used in the context of fuel, it shifts from referring to the chemical substance itself to representing a standardized rating of combustion stability. This rating determines how much compression a fuel can withstand before igniting spontaneously, which is critical for engine efficiency.
In a non-technical or metaphorical sense, the word is frequently used as an adjective in the phrase high-octane to describe something intense, energetic, or fast-paced. This usage derives from the association of high-performance fuels with speed and power, though the word remains a noun in its primary dictionary sense.
Meanings
Examples
The engine started knocking because the octane rating of the fuel was too low.
I need to find a station that sells high octane gasoline for this vintage car.
The lab technician carefully measured the volume of pure octane in the flask.
Does this engine actually require high octane fuel or is regular enough?
The chemical properties of octane make it an ideal component for motor fuels.
He wondered if increasing the octane level would actually improve the horsepower.
The manual specifies a minimum octane rating of ninety one for optimal performance.
Octane is a straight chain alkane consisting of eight carbon atoms.