The Collaborative International Dictionary of English v.0.48:

Geraniine \Ge*ra"ni*ine\, Geranine \Ger"a*nine\, n. [See
   Geranium.]
   [1913 Webster]
   1. (Med.) A valuable astringent obtained from the root of the
      Geranium maculatum or crane's-bill.
      [1913 Webster]

   2. (Chem.) A liquid terpene, obtained from the crane's-bill
      (Geranium maculatum), and having a peculiar mulberry
      odor. [Written also geraniin.]
      [1913 Webster]