water lettuce

noun

1. a floating aquatic plant, Pistia stratiotes, of the arum family, having a rosette of thick, spongy leaves.

Word History and Origins

Origin of water lettuce¹

First recorded in 1865–70

Example Sentences

Like the lake, it has great patches of water-lettuce, which in some places almost bridge the channel.

From Project Gutenberg

This is principally formed of the water-lettuce, or Pistia, an aquatic plant with long roots which descend to the bottom.

From Project Gutenberg