cetane-rating

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.
Also called cetane rating.


Origin:
1930–35

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cetane number
 
n
Compare octane number Also called: cetane rating a 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

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