barrier reef
Dictionary.com Unabridged

Barrier Reef

noun
Great Barrier Reef.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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a scrap or morsel of food left at a meal.
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Collins
World English Dictionary
barrier reef
 
—n
See Great Barrier Reef a long narrow coral reef near and lying parallel to the shore, separated from it by deep water

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
barrier reef  
A long, narrow ridge of coral that runs parallel to the mainland and is separated from it by a deep lagoon. Compare atoll, fringing reef.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

barrier reef

a coral reef (q.v.) roughly parallel to a shore and separated from it by a lagoon or other body of water. A barrier reef is usually pierced by several channels that give access to the lagoon and the island or continent beyond it.

Learn more about barrier reef with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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