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. 2019
Examples from the Web for water chestnut
Historical Examples of 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