'woolly thistle' definitions:
Definition of 'woolly thistle'
(from WordNet)
noun
Biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America [syn: cotton thistle, woolly thistle, Scotch thistle, Onopordum acanthium, Onopordon acanthium]
noun
Thistle of western North America having white woolly leaves [syn: woolly thistle, Cirsium flodmanii]