gulfweed

noun
gulf·​weed | \ ˈgəlf-ˌwēd How to pronounce gulfweed (audio) \

Definition of gulfweed

: any of several sargassums especially : a branching olive-brown seaweed (Sargassum natans) of tropical American seas with numerous berrylike air vesicles

First Known Use of gulfweed

1674, in the meaning defined above

History and Etymology for gulfweed

Gulf of Mexico

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The first known use of gulfweed was in 1674

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