Main Entry: sar·gas·sum

Pronunciation: \sär-ˈga-səm\

Function: noun

Etymology: New Latin, genus name, from International Scientific Vocabulary sargasso

Date: circa 1890

: 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