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Noun water chestnut has 3 senses
- water chestnut, water chestnut plant, caltrop - a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
--1 is a kind of aquatic plant, water plant, hydrophyte, hydrophytic plant
--1 is a member of Trapa, genus Trapa
--1 has particulars:
- water chestnut, Chinese water chestnut, Eleocharis dulcis - Chinese sedge yielding edible bulb-shaped tubers
--2 is a kind of spike rush
--2 has parts: water chestnut
- water chestnut - edible bulbous tuber of a Chinese marsh plant
--3 is a kind of tuber
--3 is a part of water chestnut, Chinese water chestnut, Eleocharis dulcis
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