Styrolene \Sty"ro*lene\, n. (Chem.) An unsaturated hydrocarbon, {C8H8}, obtained by the distillation of storax, by the decomposition of cinnamic acid, and by the condensation of acetylene, as a fragrant, aromatic, mobile liquid; -- called also {phenyl ethylene}, {vinyl benzene}, {styrol}, {styrene}, and {cinnamene}. [1913 Webster]