peucylChem.|ˈpjuːsɪl| [f.Gr. πεύκη pine + -yl.] An oily hydrocarbon obtained from turpentine-oil: also called terebilene. 1857Miller Elem.Chem. III. 442 The liquid hydrochlorate has been termed hydrochlorate of peucyl.1866–77Watts Dict.Chem. IV. 387 Peucyl, syn. with Terebilene.