seaweed

[ see-weed ]

/ ˈsiˌwid /

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noun

any plant or plants growing in the ocean.

a marine alga.

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Origin of seaweed

First recorded in 1570–80; sea + weed¹

Words nearby seaweed

seawards, seaware, sea wasp, seawater, seaway, seaweed, seaweed marquetry, sea whip, sea wolf, seaworthy, sea wrack

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use seaweed in a sentence

You may not often encounter “burgeoning” and “kelp” in the same sentence, but the seaweed is truly having a moment.
Can Kelp Be Trendy? Farmers Are Betting on It.|klindsey|July 16, 2021|Outside Online
He raises oysters, clams, mussels — and kelp, that brown, slippery seaweed that looks like packing tape.
Is the Future of Farming in the Ocean? (Ep. 467)|Stephen J. Dubner|June 24, 2021|Freakonomics
This model has diversified from nets to include seaweed farming in the Philippines.
How Surprising Connections Can Save the Ocean - Issue 99: Universality|Mary Ellen Hannibal|April 29, 2021|Nautilus
Carrageenan extracted from seaweed is used in products all over the world, but like so many other supply chains, this one has been unfair to local communities.
How Surprising Connections Can Save the Ocean - Issue 99: Universality|Mary Ellen Hannibal|April 29, 2021|Nautilus

Kayanda recently recruited 25 women on Pemba, an island off the Tanzanian coast, to start a production plant for beauty products made from seaweed.
She’s Using the Quran to Fight the Patriarchy|Daniel Malloy|January 6, 2021|Ozy
On the other hand, he found my wasabi seaweed a bit off-putting.
Tales of a Jailhouse Gourmet: How I learned to Cook in Prison|Daniel Genis|June 21, 2014|DAILY BEAST
Rich in dietary fiber and calcium, hijiki is a black-colored seaweed that grows wild on the Japanese coastline.
What to Eat: Japanese Small Plates|Cookstr.com|May 18, 2010|DAILY BEAST
Poudre de Neptune (dill, fennel, star anise, seaweed) is by far the most-used seasoning in my kitchen.
A Superstar Chef Does the Unthinkable|Amelia Smith|November 17, 2008|DAILY BEAST
The smell of wild thyme mingling with the salt of the low-tide seaweed conveyed stimulating fragrance.
Jaffery|William J. Locke
They had dug some clams at the low tide in the forenoon and put them away, covered with wet seaweed.
The Rival Campers|Ruel Perley Smith
The uniform level of the seaweed marked the line of the water at the height of the tide, and the limit of the sea in calm weather.
Toilers of the Sea|Victor Hugo
Some, covered with a hairy and glutinous seaweed, seemed like large green moles boring a way into the rock.
Toilers of the Sea|Victor Hugo
Do you see that orange-and-black striped blazer—there by the seaweed: he's pointing; that's Philip Lacey.
Mushroom Town|Oliver Onions

British Dictionary definitions for seaweed

seaweed

/ (ˈsiːˌwiːd) /

noun

any of numerous multicellular marine algae that grow on the seashore, in salt marshes, in brackish water, or submerged in the ocean

any of certain other plants that grow in or close to the sea

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

Scientific definitions for seaweed

seaweed

[ sē′wēd′ ]

Any of various red, green, or brown algae that live in ocean waters. Some species of seaweed are free-floating, while others are attached to the ocean bottom. Seaweed range from the size of a pinhead to having large fronds (such as those of many kelps) that can be as much as 30.5 m (100 ft) in length. Certain species are used for food (such as nori) and fertilizer, and others are harvested for carrageenan and other substances used as thickening, stabilizing, emulsifying, or suspending agents in industrial, pharmaceutical, and food products. Seaweed is also a natural source of the element iodine, which is otherwise found only in very small amounts. See more at brown alga green alga red alga.

seaweed

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Origin of seaweed

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British Dictionary definitions for seaweed

Scientific definitions for seaweed