Source : Webster's Revised Unabridged Dictionary (1913)

Eupittone \Eu*pit"tone\, n. [Pref. eu- + pittacal + -one.]
   (Chem.)
   A yellow, crystalline substance, resembling aurin, and
   obtained by the oxidation of pittacal; -- called also
   {eupittonic acid}. [Written also {eupitton}.]