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The Collaborative International Dictionary
Colophene

Colophene \Co"lo*phene\ (? or ?), n. (Chem.) A colorless, oily liquid, formerly obtained by distillation of colophony. It is regarded as a polymeric form of terebenthene. Called also diterebene.

Wiktionary
colophene

n. (context chemistry English) A colourless oily liquid, formerly obtained by distillation of colophony, and regarded as a polymeric form of terebenthene.