First Known Use: circa 1706
Dictionary
polygonum
noun po·lyg·o·num \pə-ˈli-gə-nəm\
Definition of POLYGONUM
: any of a genus (Polygonum) of herbs of the buckwheat family with a prominent tubular sheath around the base of each petiole, thickened nodes, and flowers that are solitary and axillary or in spiked racemes —called also knotweed
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Origin of POLYGONUM
New Latin, from Greek polygonon knotgrass, from poly- + gony knee — more at knee
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