noun
: any of various oils that are green in color or that have not been refined: as
a. : anthracene oil
b. : a fraction obtained from shale oil in the first distillation and chemical treatment
noun
: any of various oils that are green in color or that have not been refined: as
a. : anthracene oil
b. : a fraction obtained from shale oil in the first distillation and chemical treatment
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012