noun
- Biennial Eurasian white hairy thistle having pale purple flowers; naturalized in North America.
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). cotton thistle. Retrieved September 20, 2026, from http://smartdefine.org/cotton_thistle/definitions/1237571 |
| Chicago | WordNet. 2010. "cotton thistle" http://smartdefine.org/cotton_thistle/definitions/1237571 (accessed September 20, 2026). |
| Harvard | WordNet 2010, cotton thistle, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/cotton_thistle/definitions/1237571>. |
| MLA | WordNet. "cotton thistle" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/cotton_thistle/definitions/1237571> |