sea lettuce noun5 •Any of several edible seaweeds of the genus Ulva. •Similar seaweed species of other genera •Monostroma spp., also known as the slender sea lettuce, a kind of algae. •Scaevola taccada, also known as the beach cabbage, a terrestrial flowering plant species that is native to coastal regions of the Indo-Pacific. •Dudleya caespitosa, also known as the sand lettuce, a terrestrial flowering plant species that is endemic to coastal areas of California formssea lettuces
