DICT.TW Dictionary Taiwan

 Wa·ter chest·nut Bot. The fruit of Trapa natans and Trapa bicornis, Old World water plants bearing edible nutlike fruits armed with several hard and sharp points; also, the plant itself; -- called also water caltrop.
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 water chestnut
      n 1: a plant of the genus Trapa bearing spiny four-pronged edible
           nutlike fruits [syn: water chestnut plant, caltrop]
      2: Chinese sedge yielding edible bulb-shaped tubers [syn: Chinese
         water chestnut, Eleocharis dulcis]
      3: edible bulbous tuber of a Chinese marsh plant