Ra'nal (rā'n a l) adjective (Botany) Having a general affinity to ranunculaceous plants. Ranal alliance (Botany) , a name proposed by Lindley for a group of natural orders, including Ranunculaceæ, Magnoliaceæ, Papaveraceæ, and others related to them. Found on http://www.encyclo.co.uk/webster/R/9