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water lettuce

noun
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Definition of water lettuce

: a common tropical floating plant (Pistia stratiotes) forming a rosette of spongy wedge-shaped leaves

— called also water cabbage

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“Water lettuce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20lettuce. Accessed 24 Oct. 2020.

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