water-chestnut

water chestnut

noun
1.
any aquatic plant of the genus Trapa, bearing an edible, nutlike fruit, especially T. natans, of the Old World.
2.
the fruit itself.
Also called water caltrop.


Origin:
1850–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
water chestnut
 
n
1.  Also called: water caltrop a floating aquatic onagraceous plant, Trapa natans, of Asia, having four-pronged edible nutlike fruits
2.  Chinese water chestnut a Chinese cyperaceous plant, Eleocharis tuberosa, with an edible succulent corm
3.  the corm of the Chinese water chestnut, used in Oriental cookery

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