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sargassum

American

[sahr-gas-uhm] / sɑrˈgæs əm /

noun

any seaweed of the genus Sargassum, widely distributed in the warmer waters of the globe, as S. bacciferum, the common gulfweed.

sargassum British

/ sɑːˈɡæsəm, sɑːˈɡæsəʊ /

noun

any floating brown seaweed of the genus Sargassum, such as gulfweed, of warm seas, having ribbon-like fronds containing air sacs

"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

Etymology

Origin of sargassum

From New Latin, dating back to 1900–05; see origin at sargasso

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

sargassum

Green turtles experienced delays of 75% in light sargassum and 159% in heavy.

From Science Daily ● Nov. 24, 2025

"As these seaweed accumulations grow taller and more widespread, they risk blocking hatchlings entirely, draining their limited energy or leaving them stranded. Beyond impeding movement, sargassum may also reduce nesting space and alter incubation conditions."

From Science Daily ● Nov. 24, 2025

This setup allowed the team to measure how much extra effort it took to cross sargassum while observing the turtles without disturbing their behavior.

From Science Daily ● Nov. 24, 2025

“I realised it was important that after removing the sargassum from beaches, it doesn’t just go to landfills,” Ms Spencer continues.

From BBC ● Nov. 24, 2024

Between him and his goal streaked mazes of sargassum.

From The Cruise of the Dry Dock by Stribling, T. S.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023