water lettuce Meaning, Definition & Usage
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noun pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
pistia; water cabbage; Pistia stratiotes; Pistia stratoites.
WordNet
Wa"ter let"tuce
Definitions
(Bot.) A plant ( J. Smith (Dict. Econ. Plants).Pistia stratiotes ) which floats on tropical waters, and forms a rosette of spongy, wedge-shaped leaves.