'Water chestnut' definitions:
Definition of 'water chestnut'
(from WordNet)
noun
A plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits [syn: water chestnut, water chestnut plant, caltrop]
noun
Chinese sedge yielding edible bulb-shaped tubers [syn: water chestnut, Chinese water chestnut, Eleocharis dulcis]
noun
Edible bulbous tuber of a Chinese marsh plant
Definition of 'Water chestnut'
From: GCIDE
- Water chestnut \Wa"ter chest"nut\ (Bot.) 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. [1913 Webster]