knotgrass

English

Etymology

From knot +‎ grass.

Noun

knotgrass (countable and uncountable, plural knotgrasses)

  1. An annual plant, Polygonum aviculare, found in fields and wasteland
    Synonym: centinode
  2. Paspalum distichum, a weedy perennial grass of wet areas
    Synonym: water couch

Derived terms

Translations