中ちゅう油ゆMeanings1nounmiddle oilchemistryTechnical term in chemistry for an oil fraction obtained at intermediate distillation temperatures.中ちゅう油ゆは原げん油ゆの蒸じょう留りゅうで得えられる留りゅう分ぶんの一ひとつである。Middle oil is one of the fractions obtained from crude oil distillation.
