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cetane number
noun
- a measure of the ignition quality of a diesel engine fuel by comparison with various mixtures in which the alpha form of methylnaphthalene is given a standard value of 0 and cetane is given a standard value of 100.
cetane number
noun
- See octane numbera measure of the quality of a diesel fuel expressed as the percentage of cetane in a mixture of cetane and 1-methylnapthalene of the same quality as the given fuel Also calledcetane rating Compare octane number
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Word History and Origins
Origin of cetane number1
First recorded in 1930–35
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