9 Grammatical Pitfalls


[see-weed] /ˈsiˌwid/
any plant or plants growing in the ocean.
a marine alga.
Origin of seaweed
1570-80; sea + weed1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for seaweed
  • Dashi is a brilliant concoction based on kelp, a seaweed and dried bonito flakes.
  • Sunlight penetrates the shallow waters, and many kinds of organisms flourish-from microscopic shrimp to giant seaweed called kelp.
  • Bull kelp is the fastest growing seaweed in the world.
  • In that time, overfishing has allowed seaweed and algae to grow unchecked, smothering coral worldwide.
  • Rose from their seaweed chamber the choir of the mystical sea-maids.
  • Noble descent and worth, unless united with wealth, are esteemed no more than seaweed.
  • Initial trials using a seaweed derivative failed, and might even have made things worse.
  • There are other reports that the sharks would sometimes slip off of the platform and get tangled in a bed of seaweed.
  • Yet the strangest thing on the menu is not chicken at all, but seaweed.
  • We can't wait to find out more about the surf smelt and seaweed they're planning to forage, and the goat cheeses and yogurt.
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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