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knotgrass

 - 2 dictionary results
knot·grass   (nŏt'grās')   
n.  
  1. A low-growing, weedy grass (Paspalum distichum) with spikelets arranged in two rows along the rachis.

  2. Any of several weedy plants of the genus Polygonum having stems with nodes.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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knotgrass

noun
low-growing weedy grass with spikelets along the leaf stems 
WordNet® 3.0, © 2006 by Princeton University.
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