sow thistle

noun
\ ˈsau̇- How to pronounce sow thistle (audio) \

Definition of sow thistle

: any of a genus (Sonchus) of spiny weedy Eurasian and African composite herbs including some (such as S. arvensis and S. oleraceus) widely naturalized in North America

First Known Use of sow thistle

13th century, in the meaning defined above

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