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| smart·weed [ smrt wd ] (plural smart·weeds) |
noun |
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| Definition: |
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plant with acidic juice: a plant of the buckwheat family that grows in marshy temperate regions and has acidic juice that can irritate the skin. One variety of smartweed is water pepper, a plant with peppery-tasting leaves. Genus Polygonum.
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| [Late 18th century. Because its acidic juice causes smarting] |
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