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polygonum

/ (pəˈlɪɡənəm) /
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noun
any polygonaceous plant of the genus Polygonum, having stems with knotlike joints and spikes of small white, green, or pink flowersSee also knotgrass, bistort, prince's feather (def. 2)
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Word Origin for polygonum

C18: New Latin, from Greek polugonon knotgrass, from polu- poly- + -gonon, from gonu knee
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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