water chestnut plant wa·terc·hest·nutplant uncommon noun 1. a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits Synonymswater chestnutwater chestnut plantcaltrop Related words Broader terms aquatic plant Narrower terms water caltropling Parts Trapa WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
