cetane number

noun

Definition of cetane number

: a measure of the ignition value of a diesel fuel that represents the percentage by volume of cetane in a mixture of liquid methylnaphthalene that gives the same ignition lag as the oil being tested

called also cetane rating

— compare octane number

First Known Use of cetane number

1935, in the meaning defined above

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The first known use of cetane number was in 1935

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Cite this Entry

“Cetane number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cetane%20number. Accessed 6 Jul. 2020.

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