1) Hydrocarbon 2) Oily hydrocarbon 
Indene is a flammable polycyclic hydrocarbon with chemical formula C9H8. It is composed of a benzene ring fused with a cyclopentene ring. This aromatic liquid is colorless although samples often are pale yellow. The principal industrial use of indene is in the production of indene/coumarone thermoplastic resins. ==Isolation== Indene occurs natural...
[n] - a colorless liquid hydrocarbon extracted from petroleum or coal tar and used in making synthetic resins
a colorless, liquid hydrocarbon, CH, obtained from coal tar by fractional distillation: used in synthesizing resins.