Source : Webster's Revised Unabridged Dictionary (1913)

Naphthalene \Naph"tha*lene\, n. (Chem.)
   A white crystalline aromatic hydrocarbon, {C10H8}, analogous
   to benzene, and obtained by the distillation of certain
   bituminous materials, such as the heavy oil of coal tar. It
   is the type and basis of a large number of derivatives among
   organic compounds. Formerly called also {naphthaline}.

   {Naphthalene red} (Chem.), a dyestuff obtained from certain
      diazo derivatives of naphthylamine, and called also
      {magdala red}.

   {Naphthalene yellow} (Chem.), a yellow dyestuff obtained from
      certain nitro derivatives of naphthol.