- A tropical aquatic plant of the arum family that forms a floating rosette of leaves.
More example sentences
- Pistia stratiotes, family Araceae
- I like the gray-green leaves of water lettuce, another boatlike floater, and the tiny fronds of Azolla filiculoides, a fern that happens to float.
- Three illegal species that top the list are the highly invasive water hyacinth, water lettuce and giant salvinia.
- The move is aimed at trying to slow spread of harmful aquatic vegetation such as hydrilla, hyacinth, water lettuce and salvinia, alien plants that can denigrate freshwater fisheries.
More definitions of water lettuceDefinition of water lettuce in:
- The British & World English dictionary