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Definition of polygonum


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po·lyg·o·num  audio  (p-lg-nm) KEY 

NOUN:
Any of numerous plants of the widely distributed genus Polygonum, characterized by stems with knotlike joints and conspicuous sheathlike stipules.

ETYMOLOGY:
New Latin Polygonum, genus name, from Greek polugonon, knotgrass : polu-, poly- + gonu, knee; see genu-1 in Indo-European roots


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