• synonyms

sea lettuce

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

First recorded in 1660–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for sea lettuce

Historical Examples

  • There is sea-lettuce in the water, so there must be enough air.

    Harper's Young People, September 21, 1880


  • Ulva, or sea-lettuce, is to be found in abundance in all our small bays and inlets at low tide.

British Dictionary definitions for sea lettuce

sea lettuce

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