gulfweed

gulfweed

[guhlf-weed]
noun
1.
a coarse, olive-brown, branching seaweed, Sargassum bacciferum, common in the Gulf Stream and tropical American seas, characterized by numerous berrylike air vessels.
2.
any seaweed of the same genus.

Origin:
1665–75; gulf + weed1

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World English Dictionary
gulfweed (ˈɡʌlfˌwiːd)
 
n
sargasso, Also called: sargasso weed any brown seaweed of the genus Sargassum, esp S. bacciferum, having air bladders and forming dense floating masses in tropical Atlantic waters, esp the Gulf Stream

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