Definition of "fluorene" []

• A polycyclic aromatic hydrocarbon consisting of two benzene rings joined together directly, and also via a methylene bridge; it is used in light-emitting diodes. (noun)

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• "M.P. 273°-276° C., and yields fluorene on distillation with zinc dust."
• "C. Distillation with zinc dust yields fluorene (see above) --"
• "The latter reaction especially illustrates the analogous formation of fluorene from compounds of the type --"