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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). water chestnut. Retrieved September 28, 2026, from http://smartdefine.org/water_chestnut/definitions/2080860 |
| Chicago | Webster's. 2011. "water chestnut" http://smartdefine.org/water_chestnut/definitions/2080860 (accessed September 28, 2026). |
| Harvard | Webster's 2011, water chestnut, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/water_chestnut/definitions/2080860>. |
| MLA | Webster's. "water chestnut" 28 May 2011. Web. 28 September 2026. <http://smartdefine.org/water_chestnut/definitions/2080860> |