The Chinese water chestnut more often called simply the water chestnut, but not to be confused with the unrelated water caltrop which also goes by that name, is a grass-like sedge grown for its edible corms. It has tube-shaped, leafless green stems that grow to about 1.5 metres high.

The Chinese water chestnut is native to China and is widely cultivated in flooded paddy fields in southern China and parts of the Philippines.

The small, rounded corms have a crispy white flesh and can be eaten raw, slightly boiled, grilled, pickled, or tinned. They are a popular ingredient in Western-style Chinese dishes. In China, they are most often eaten raw, sometimes sweetened. They can also be ground into a flour which is used especially to make fried cakes called matigao

The corms are rich in carbohydrates (about 90% by dry weight), especially starch (about 60% by dry weight), and are also a good source of dietary fiber, riboflavin, vitamin B6, potassium, copper, and manganese