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.

Celandine \Cel"an*dine\ (s[e^]l"[a^]n*d[imac]n), n. [OE.
   celidoine, OF. celidoine, F. ch['e]lidoine, fr. L. chelidonia
   (sc. herba), fr. chelidonius pertaining to the swallow, Gr.
   chelido`nios, fr. chelidw`n the swallow, akin to L. hirundo a
   swallow.] (Bot.)
   A perennial herbaceous plant ({Chelidonium majus}) of the
   poppy family, with yellow flowers. It is used as a medicine
   in jaundice, etc., and its acrid saffron-colored juice is
   used to cure warts and the itch; -- called also {greater
   celandine} and {swallowwort}.

   {Lasser celandine}, the pilewort ({Ranunculus Ficaria}).

Source : WordNet®

Ranunculus ficaria
     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}, {pilewort}]