- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for gulfweed
Some sea-horses cling by their tails to gulfweed or sea-wrack.A Guide to the Study of Fishes, Volume 1 (of 2)
David Starr Jordan
Sea-lentil is a name sometimes applied to the gulfweed Sargassum vulgare.
- 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