Noun has 2 senses

• woolly thistle(n = noun.plant) cotton thistle, onopordon acanthium, onopordum acanthium, scotch thistle - biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America;



• woolly thistle(n = noun.plant) cirsium flodmanii - thistle of western North America having white woolly leaves;