noun
: an oily liquid obtained by destructive distillation of rosin and composed principally of hydrocarbons with some resin acids ; especially : the viscous fraction that boils higher than rosin spirit, that when crude is dark-colored and fluorescent and has a sharp odor, and that is used chiefly in making lubricating greases and printing inks, in impregnating paper coverings for electric cables, and in compounding with other oils