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Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A hydrocarbon consisting an aromatic unit (typically a benzene ring) and an aliphatic chain that forms a bridge between two positions of the aromatic ring; more complex derivatives (the superphanes) with multiple aromatic units and bridges forming cagelike structures are known. Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.