| 1. | any of certain aquatic plants belonging to the genus Nymphoides, of the gentian family, esp. N. aquatica, having floating, more or less heart-shaped leaves and a cluster of small, white, five-petaled flowers. |
| 2. | a related plant, Nymphoides cordata, of North America, having a cluster of white flowers and round or somewhat oval leaves that are purple beneath. |
