Definition of pinkweed in English:

pinkweed

noun

  • Either of two plants of the genus Polygonum: (a) knotgrass, P. aviculare (English regional (northern) in later use); (b) US smartweed, P. pennsylvanicum.

Origin

Mid 17th century; earliest use found in William Coles (1626–1662), botanist. From pink + weed.

Pronunciation

pinkweed

/ˈpɪŋkwiːd/