Source : Webster's Revised Unabridged Dictionary (1913)

Frangulic \Fran*gu"lic\, Frangulinic \Fran`gu*lin"ic\, a.
   (Chem.)
   Pertaining to, or drived from, frangulin, or a species
   ({Rhamnus Frangula}) of the buckthorn.

   {Frangulinic acid} (Chem.), a yellow crystalline substance,
      resembling alizarin, and obtained by the decomposition of
      frangulin.