[cetane number] n (1935): 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
CETANE NUMBER
Meaning of CETANE NUMBER in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012