from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A biennial Eurasian thistle (Cirsium vulgare) in the composite family, naturalized in North America and having heads of purplish flowers and spiny stems and leaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Spear thistle.
from the GNU version of the Collaborative International Dictionary of English
- n. Cnicus lanceolatus, the common large thistle of neglected pastures.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United States
From its large head.(American Heritage® Dictionary of the English Language, Fourth Edition)