from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A low-growing, weedy grass (Paspalum distichum) with spikelets arranged in two rows along the rachis.
  • n. Any of several weedy plants of the genus Polygonum having stems with nodes.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An annual plant, Polygonum aviculare, found in fields and wasteland

from the GNU version of the Collaborative International Dictionary of English

  • n. a common weed with jointed stems (Polygonum aviculare); knotweed.
  • n. The dog grass. See under dog.

from The Century Dictionary and Cyclopedia

  • n. A weed of almost world-wide distribution, Polygonum aviculare: so called from the numerous nodes in its stems and its thickly spreading habit.
  • n. By extension, any plant of the genus Polygonum, properly knotweed.
  • n. In occasional use, a plant of some other genus more or less similar.
  • n. Couch-grass: a use of doubtful appropriateness.
  • n.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. low-growing weedy grass with spikelets along the leaf stems


Sorry, no etymologies found.



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