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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
sea·weed    Audio Help   [see-weed] Pronunciation Key
–noun
1.any plant or plants growing in the ocean.
2.a marine alga.

[Origin: 1570–80; sea + weed1]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Encyclopædia Britannica, Inc.
Seaweed

To learn more about Seaweed visit Britannica.com

© 2008 Encyclopædia Britannica, Inc.
American Heritage Dictionary - Cite This Source - Share This
sea·weed    Audio Help   (sē'wēd')  Pronunciation Key 
n.  
  1. Any of numerous marine algae, such as a kelp, rockweed, or gulfweed.
  2. Any of various marine plants.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Online Etymology Dictionary - Cite This Source - Share This
seaweed 
1577, from sea + weed (q.v.).

Online Etymology Dictionary, © 2001 Douglas Harper
WordNet - Cite This Source - Share This
seaweed

noun
plant growing in the sea, especially marine algae 

WordNet® 3.0, © 2006 by Princeton University.
Kernerman English Multilingual Dictionary - Cite This Source - Share This
ˈseaweed noun
plants growing in the sea
Example: The beach was covered with seaweed.
Arabic: أعْشاب بَحْرِيَّه
Chinese (Simplified): 海草
Chinese (Traditional): 海草
Czech: chaluha
Danish: tang
Dutch: zeewier
Estonian: adru
Finnish: merilevä, meriruoho
French: algue(s)
German: der Seetang
Greek: φύκια
Hungarian: hínár
Icelandic: sjávargróður; þari, þang
Indonesian: rumput laut
Italian: alga
Japanese: 海草
Korean: 해초, 해조(海藻)
Latvian: jūraszāles
Lithuanian: jūros žolės
Norwegian: tang, tare, alge
Polish: wodorosty
Portuguese (Brazil): alga
Portuguese (Portugal): alga
Romanian: alge
Russian: морская водоросль
Slovak: chaluha
Slovenian: morska trava
Spanish: alga
Swedish: havsväxter, tång
Turkish: deniz yosunu
See also: at sea, sea-going, sea-lion, seaboard, seafaring, seafood, seafront, seagull, seaman, seaport, seashell, seashore, seasick, seaside, seaward(s), seaworthy, go to sea, put to sea, sea, sea breeze, sea level

Kernerman English Multilingual Dictionary, © 2000-2006 K Dictionaries Ltd.
The American Heritage Science Dictionary - Cite This Source - Share This
seaweed    Audio Help   (sē'wēd')  Pronunciation Key 


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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 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Seaweed

Sea"weed`\, n. 1. Popularly, any plant or plants growing in the sea.

2. (Bot.) Any marine plant of the class Alg[ae], as kelp, dulse, Fucus, Ulva, etc.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
On-line Medical Dictionary - Cite This Source - Share This

seaweed

seaweed: in CancerWEB's On-line Medical Dictionary

On-line Medical Dictionary, © 1997-98 Academic Medical Publishing & CancerWEB
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