gulf·weed also gulf weed (glfwēd)
n.
Any of several brownish seaweeds of the genus Sargassum of tropical Atlantic waters, having rounded air bladders and often forming dense, floating masses. Also called sargasso, sargassum.

[TahlilGaran] American Dictionary ▲

gulfweed
[After the Mexico, Gulf of.]

[TahlilGaran] American Dictionary ▲