gulfweed

[ guhlf-weed ]
/ ˈgʌlfˌwid /

noun

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

RELATED WORDS

Origin of gulfweed

First recorded in 1665–75; gulf + weed1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for gulfweed

gulfweed

/ (ˈɡʌlfˌwiːd) /

noun

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 StreamAlso called: sargasso, sargasso weed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012