Definition of: pilewort

(pīl′wûrt′) noun
1. An Old World crow-foot (Ranunculus ficaria), producing tuberous roots and yellow flowers.
2. An American species of fireweed (Erechtites hieracifolia).
3. The princess feather. [Trans. of Med. L ficaria <L ficus a fig, piles; with ref. to its reputed ability to cure hemorrhoids]