cotton thistle

noun

Definition of cotton thistle

: a biennial white-tomentose prickly Eurasian herb (Onopordon acanthium) with pale purple flowers that is naturalized in North America

called also Scotch thistle

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Cite this Entry

“Cotton thistle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cotton%20thistle. Accessed 23 Oct. 2020.

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