Source : Webster's Revised Unabridged Dictionary (1913)

Sequoiene \Se*quoi"["e]ne\, n. (Chem.)
   A hydrocarbon ({C13H10}) obtained in white fluorescent
   crystals, in the distillation products of the needles of the
   California ``big tree'' ({Sequoia gigantea}).

Fluorene \Flu`or*ene\, n. (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.