floating heart

noun

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

Origin of floating heart

An Americanism dating back to 1855–60

Words nearby floating heart

floating debt, floating dock, floating exchange rate, floating foundation, floating gang, floating heart, floating island, floating kidney, floating partition, floating point, floating policy

British Dictionary definitions for floating heart

floating heart

noun

any perennial aquatic freshwater plant of the genus Nymphoides, esp N. lacunosum, having floating heart-shaped leaves: family Menyanthaceae