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.

Origin of gulfweed

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

Related Words for gulfweed

algae, tangle, rockweed

Examples from the Web for gulfweed

Historical Examples of gulfweed

British Dictionary definitions for gulfweed



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