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WordReference Random House Unabridged Dictionary of American English © 2024bone•set (bōn′set′),USA pronunciation n. - Plant Biologyany composite plant of the genus Eupatorium, esp. E. perfoliatum, of North America, having white flowers in a flat-topped cluster. Also called thoroughwort.
- bone1 + set (verb, verbal), so named (by hyperbole) because supposed to have healing properties 1810–20, American.
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