Definition of polygonum in English:

polygonum

Syllabification: po·lyg·o·num
Pronunciation: /pəˈligənəm
 
/

noun

  • A plant of a genus that includes knotgrass and knotweed, of which some are weeds and some are garden ornamentals.
    • Genus Polygonum, family Polygonaceae
    More example sentences
    • Also on February 15, 310 acres in Santa Cruz County were proposed as critical habitat for the Scotts Valley spineflower (Chorizanthe robusta var. hartwegii) and the Scotts Valley polygonum.
    • ‘I love how it grows into the polygonum,’ Julie says.
    • The Scotts Valley polygonum, a small annual in the buckwheat family, has linear-shaped leaves and produces white flowers.

Origin

modern Latin, from Greek polu- 'many' + gonu 'knee, joint' (because of the swollen joints sheathed by stipules).

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