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Webster 1913 Edition

Noun.

(Chem.)

A colorless, crystalline hydrocarbon,

C13H10

having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially.

See also: fluorène

fluorene ‎(plural fluorenes)

(organic chemistry) 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.