Definitions for water chestnut
Random House Webster's College Dictionary
any of several aquatic plants of the genus Trapa, family Trapaceae, with an edible, nutlike fruit, esp. T.natans of the Old World.
the fruit itself. Also called wa′ter cal`trop.
water chestnut, water chestnut plant, caltrop(noun)
a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
water chestnut, Chinese water chestnut, Eleocharis dulcis(noun)
Chinese sedge yielding edible bulb-shaped tubers
edible bulbous tuber of a Chinese marsh plant
A particular species, Eleocharis dulcis, of plant.
A corm of a plant of this species.
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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