Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- a brown algae (genus Sargassum) with berrylike air sacs, found floating in the Gulf Stream, Pacific Ocean, etc.
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
also gulf weed noun
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.
Origin: After the Gulf of Mexico.