1. water fern of Europe and Asia and the eastern United States distinguished by four leaflets resembling clover leaves; [syn: water clover, Marsilea quadrifolia]
WordNet (r) 3.0 (2006):
water clover
n 1: water fern of Europe and Asia and the eastern United States
distinguished by four leaflets resembling clover leaves
[syn: water clover, Marsilea quadrifolia]