sargassum
noun
sar·gas·sum
sär-ˈga-səm 
: any of a genus (Sargassum) of brown algae that have a branching thallus with lateral outgrowths differentiated as leafy segments, air bladders, or spore-bearing structures : gulfweed
Examples of sargassum in a Sentence
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The sargassum bloom itself is not a new phenomenon.
—
Stephanie Elam, CNN Money, 15 May 2025
What's next: This month, more sargassum is expected to head to the west Caribbean Sea and the Gulf.
—Martin Vassolo, Axios, 6 May 2025
Large sargassum deposits can block sunlight needed by coral reefs and sea grass meadows, while organisms within the wash die or are scavenged by birds.
—Sophie Clark, MSNBC Newsweek, 6 June 2025
The University of South Florida’s Optical Oceanography Lab tracks the growth of this type of seaweed, called sargassum, closely.
—Alix Martichoux, The Hill, 4 June 2025
See All Example Sentences for sargassum
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Stephanie Elam, CNN Money, 15 May 2025
What's next: This month, more sargassum is expected to head to the west Caribbean Sea and the Gulf.
—Martin Vassolo, Axios, 6 May 2025
Large sargassum deposits can block sunlight needed by coral reefs and sea grass meadows, while organisms within the wash die or are scavenged by birds.
—Sophie Clark, MSNBC Newsweek, 6 June 2025
The University of South Florida’s Optical Oceanography Lab tracks the growth of this type of seaweed, called sargassum, closely.
—Alix Martichoux, The Hill, 4 June 2025
See All Example Sentences for sargassum
Cite this Entry
“Sargassum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sargassum. Accessed 19 Jul. 2025.
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sargassum
noun
sar·gas·sum
sär-ˈgas-əm
: any of a genus of brown algae that have a leafy branching body and air bladders and that often grow in free-floating masses in the ocean
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