Meaning of floating heart

float'ing heart'

Pronunciation: [key]
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.