sea·​grass ˈsē-ˌgras How to pronounce seagrass (audio)
: any of various submerged monocotyledonous plants (such as eelgrass, tape grass, and turtle grass) of tropical to temperate usually shallow coastal waters that have narrow grasslike leaves and often form dense underwater meadows

Example Sentences

Recent Examples on the Web This extra fertilizer drives microalgae blooms, which block sunlight from reaching seagrass. Max G. Levy, WIRED, 3 Jan. 2023 Scientists found that the largest plant in the world is a seagrass and that 60 million icefish nest together off the coast of Antarctica. Danielle Hall, Smithsonian Magazine, 20 Dec. 2022 This is why protecting natural climate change deterrents like seagrass is such an important goal for so many nations. Joshua Hawkins, BGR, 12 Dec. 2022 Tiger sharks equipped with cameras and sensors have helped marine scientists identify and measure the largest seagrass ecosystem recorded. Laura Millan Lombrana,, 1 Nov. 2022 The parcel on offer is submerged under the Intracoastal Waterway in Boca Raton with a base of muck, sand and seagrass. Laura L. Davis, USA TODAY, 31 Oct. 2022 Formentera's beaches—the island's calling card—are luminous, improbably blue thanks to offshore meadows of Posidonia oceanica seagrass. Maya Boyd, Condé Nast Traveler, 1 Aug. 2022 The OceanX team spent 455 survey hours on the mission, covering a wide range of habitats, from shallow seagrass beds and coral reefs, to depths of more than 1,700 meters. Jeff Kart, Forbes, 11 Nov. 2022 The agencies also took the unusual step last winter, as manatees starved because of a lack of seagrass, a key food source. Jim Turner, Orlando Sentinel, 30 Nov. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seagrass.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1578, in the meaning defined above

Time Traveler
The first known use of seagrass was in 1578

Dictionary Entries Near seagrass

Cite this Entry

“Seagrass.” Dictionary, Merriam-Webster, Accessed 29 Jan. 2023.

Last Updated: - Updated example sentences
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