'Water lettuce' definitions:

Definition of 'water lettuce'

(from WordNet)

noun

Pantropical floating plant forming a rosette of wedge- shaped leaves; a widespread weed in rivers and lakes [syn: pistia, water lettuce, water cabbage, Pistia stratiotes, Pistia stratoites]

Definition of 'Water lettuce'

From: GCIDE

Water lettuce \Wa"ter let"tuce\ (Bot.) A plant (Pistia stratiotes) which floats on tropical waters, and forms a rosette of spongy, wedge-shaped leaves. --J. Smith (Dict. Econ. Plants). [1913 Webster]

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