The Collaborative International Dictionary of English v.0.48:

Ranal \Ra"nal\ (r[=a]"nal), a. (Bot.)
   Having a general affinity to ranunculaceous plants.
   [1913 Webster]

   Ranal alliance (Bot.), a name proposed by Lindley for a
      group of natural orders, including Ranunculaceae,
      Magnoliaceae, Papaveraceae, and others related to them.
      [1913 Webster]