[syn: coltsfoot, Tussilago farfara]
The Collaborative International Dictionary of English v.0.48:
Coltsfoot \Colts"foot`\, n. (Bot.)
   A perennial herb (Tussilago Farfara), whose leaves and
   rootstock are sometimes employed in medicine.
   [1913 Webster]
   Butterbur coltsfoot (Bot.), a European plant (Petasites
      vulgaris).
      [1913 Webster]
WordNet (r) 3.0 (2006):
coltsfoot
    n 1: tufted evergreen perennial herb having spikes of tiny white
         flowers and glossy green round to heart-shaped leaves that
         become coppery to maroon or purplish in fall [syn: galax,
         galaxy, wandflower, beetleweed, coltsfoot, Galax
         urceolata]
    2: perennial herb with large rounded leaves resembling a colt's
       foot and yellow flowers appearing before the leaves do;
       native to Europe but now nearly cosmopolitan; used
       medicinally especially formerly [syn: coltsfoot, Tussilago
       farfara]