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| knot·grass [ nót gràss ] (plural knot·grass·es or knot·grass) |
noun |
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| Definition: |
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weed once used to treat asthma: a creeping plant with small pink flowers and prominent nodes on its stems, considered a troublesome weed. Native to: Europe. Latin name Polygonum aviculare.
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| [Early 16th century. < its knotted stem] |
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