seaweed

Types:

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arame

an edible seaweed with a mild flavor

wrack

dried seaweed especially that cast ashore

seagrass

any of various seaweeds that grow underwater in shallow beds

sea wrack, wrack

growth of marine vegetation especially of the large forms such as rockweeds and kelp

sea tang, tang

any of various coarse seaweeds

Type of:

alga, algae

primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves