First Known Use: circa 1890
Dictionary
sargassum
noun sar·gas·sum \sär-ˈga-səm\
Definition of SARGASSUM
: any of a genus (Sargassum) of brown algae that have a branching thallus with lateral outgrowths differentiated as leafy segments, air bladders, or spore-bearing structures : gulfweed
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Origin of SARGASSUM
New Latin, genus name, from International Scientific Vocabulary sargasso
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