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sea lettuce

noun

  1. any seaweed of the genus Ulva, having large leaflike blades.

sea lettuce

noun

  1. any of various green seaweeds of the genus Ulva, which have edible wavy translucent fronds

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of sea lettuce1

First recorded in 1660–70

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sea lettersea level

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