from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several perennial herbs of the genus Petasites in the composite family, native to northern temperate regions and having large basal leaves and dense clusters of usually whitish or purplish flower heads.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several Eurasian herbs, of the genus Petasites, have dense clusters of often purple flowers
from the GNU version of the Collaborative International Dictionary of English
- n. A broad-leaved plant (Petasites vulgaris) of the Composite family, said to have been used in England for wrapping up pats of butter.
from The Century Dictionary and Cyclopedia
- n. A name of the sweet coltsfoot, Petasites vulgaris. Also called butter-dock.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas
butter + bur (Wiktionary)