Definition of polygonum in English:

polygonum

noun

  • A plant of a genus that includes knotgrass and knotweed, some of which are weeds and some are garden ornamentals.

    • ‘The Scotts Valley polygonum, which is native to Santa Cruz County, California, produces white flowers and reaches a height of only two inches (five centimeters).’
    • ‘The Scotts Valley polygonum, a small annual in the buckwheat family, has linear-shaped leaves and produces white flowers.’
    • ‘‘I love how it grows into the polygonum,’ Julie says.’
    • ‘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.’
    • ‘Most of the starchy grains that are present at Langford sites are either wild chenopod or polygonum seeds.’

Origin

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

Pronunciation:

polygonum

/pəˈlɪɡ(ə)nəm/