'Trapa bicornis' definitions:

Definition of 'Trapa bicornis'

(from WordNet)
noun
Water chestnut whose spiny fruit has two rather than 4 prongs [syn: ling, ling ko, Trapa bicornis]

Definition of 'Trapa bicornis'

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]