'Water caltrop' definitions:

Definition of 'water caltrop'

From: WordNet
noun
A variety of water chestnut [syn: water caltrop, Jesuits' nut, Trapa natans]

Definition of 'Water caltrop'

From: GCIDE
  • Water caltrop \Wa"ter cal"trop\ (Bot.) The water chestnut. [1913 Webster]

Definition of 'water caltrop'

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]