(n)perennial herb native to Europe but naturalized elsewhere having heart-shaped leaves and yellow flowers resembling buttercups; its tuberous roots have been used as a poultice to relieve piles, Syn.Ranunculus ficaria, pilewort
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. (Bot.) A plant (Ranunculus Ficaria of Linnæus) whose tuberous roots have been used in poultices as a specific for the piles. Forsyth. [ 1913 Webster ]