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Related to atoll: Midway Atoll
An atoll is created as a coral reef builds up around an eroding volcanic island.
a·toll(ăt′ôl′, -ŏl′, ā′tôl′, ā′tŏl′)
An island or chain of islets connected by a coral reef that nearly or entirely encloses a lagoon.
[Dhivehi atholhu; probably akin to Sinhalese ätul, interior (from the interior lagoon), probably from Sanskrit *antala-, interior, variant of antara-; see en in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physical Geography) a circular coral reef or string of coral islands surrounding a lagoon
[C17: from atollon, native name in the Maldive Islands]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
at•oll(ˈæt ɔl, -ɒl, -oʊl)
a ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon.
[1615–25; earlier atollon < French]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
An atoll develops (from left to right) when a volcanic island erodes and a ring of coral grows up around it. The depression left by the crater of an eroding volcano fills with water, forming a lagoon.
A coral island forming a ring that nearly or entirely encloses a shallow lagoon.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A ring-shaped coral reef enclosing a lagoon.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
atoll[ˈætɒl] N → atolón m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
atoll[ˈætɒl] n → atoll m
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
n → Atoll nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
atoll[ˈætɒl] n → atollo
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995