Lake·weed n. Bot. The water pepper (Polygonum Hydropiper), an aquatic plant of Europe and North America.
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Smart·weed n. Bot. An acrid plant of the genus Polygonum (Polygonum Hydropiper), which produces smarting if applied where the skin is tender.
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Cul·rage n. Bot. Smartweed (Polygonum Hydropiper).
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Hy·dro·pi·per n. Bot. A species (Polygonum Hydropiper) of knotweed with acrid foliage; water pepper; smartweed.
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