indene

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A colorless organic liquid, C₉H₈, obtained from coal tar and used in preparing synthetic resins.

Century Dictionary and Cyclopedia

1. n. A colorless viscid liquid, , found in coal-tar oil. It boils at 179.5–180.5° C.

Wiktionary

1. n. organic chemistry The bicyclic hydrocarbon consisting of a benzene ring fused to one of cyclopentadiene.

WordNet 3.0

1. n. a colorless liquid hydrocarbon extracted from petroleum or coal tar and used in making synthetic resins