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90s Slang You Should Know


[see-weed] /ˈsiˌwid/
any plant or plants growing in the ocean.
a marine alga.
Origin of seaweed
First recorded in 1570-80; sea + weed1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for seaweed
Contemporary Examples
Historical Examples
  • Ferrier saw an object like a mass of seaweed, but the night was so pitchy that no outline could be made out.

    A Dream of the North Sea James Runciman
  • I took the dark spot to be a patch of seaweed, and told him to go on.

  • Joy sparkles on every pebble; Art spreads its welcome arms through every spray of seaweed.

  • I can't think why you flop about so helplessly, like a bit of seaweed.

    The Longest Journey E. M. Forster
  • No remains of plants have been found in Cambrian strata, except some doubtful markings, as of seaweed.

    The Elements of Geology William Harmon Norton
  • When that provision fails, I have heard they live on seaweed.

  • The river at Cloisterham is sufficiently near the sea to throw up oftentimes a quantity of seaweed.

    The Mystery of Edwin Drood Charles Dickens
  • There is squid to follow, and sea urchins and a seaweed salad.

    A Son Of The Sun Jack London
  • Chauncy was now sincerely anxious to win the laurels of the day, the arrival of the seaweed Townies having toned up the market.

    Fighting the Sea Edward A. Rand
British Dictionary definitions for seaweed


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
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Word Origin and History for seaweed

1570s, from sea + weed (n.). An Old English word for it was sæwar.

Online Etymology Dictionary, © 2010 Douglas Harper
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seaweed in Science

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.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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