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Definition of: polygonum
(pə·lig′ə·nəm) noun
Any of a large and widely distributed genus (Polygonum) of annual or perennial herbs. The common smartweed, the prince's-feather, and the bistort are among the best-known species. Also po·lyg′o·ny. [<NL <L polygonos <Gk. polygonon knotgrass <poly- many + gony knee; from its many joints]
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