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- (uncountable) Chinese water chestnut (Eleocharis dulcis), grown for its edible corm, used in Asian cooking.
- (countable) A corm of a plant of this species.
- A water caltrop (Trapa natans).
- The usage of water chestnut for the water caltrop is best avoided, so as to prevent confusion
corm of this species
water caltrop — see water caltrop