lady's thumb

noun

Definition of lady's thumb

: a widely distributed weedy annual herb (Polygonum persicaria) of the buckwheat family that has large lanceolate leaves often with a blackish blotch suggesting a thumbprint

First Known Use of lady's thumb

1820, in the meaning defined above

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The first known use of lady's thumb was in 1820

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Cite this Entry

“Lady's thumb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lady%27s%20thumb. Accessed 29 Sep. 2020.

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