Source : Webster's Revised Unabridged Dictionary (1913)

Pilewort \Pile"wort`\, n. (Bot.)
   A plant ({Ranunculus Ficaria} of Linn[ae]us) whose tuberous
   roots have been used in poultices as a specific for the
   piles. --Forsyth.

Source : WordNet®

pilewort
     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: {lesser celandine}, {Ranunculus
         ficaria}]