- any aquatic plant of the genus Trapa, bearing an edible, nutlike fruit, especially T. natans, of the Old World.
- the fruit itself.
Origin of water chestnut
First recorded in 1850–55
Also called water caltrop.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for water chestnut
Once I was as full of romance as a water-chestnut is of starch.Parrot & Co.
- Also called: water caltrop a floating aquatic onagraceous plant, Trapa natans, of Asia, having four-pronged edible nutlike fruits
- Chinese water chestnut a Chinese cyperaceous plant, Eleocharis tuberosa, with an edible succulent corm
- the corm of the Chinese water chestnut, used in Oriental cookery
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012