atoll

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Bassas da India: the atoll is a circular reef that sits atop a long-extinct, submerged volcano

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Definitions (5)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. noun A ringlike coral island and reef that nearly or entirely encloses a lagoon.

Toggle Century definitions Century Dictionary (2)

Toggle GNU Webster definitions GNU Webster's 1913 (1)

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Examples (50)

  • The atoll was the shape roughly of a thin slice of quarter-moon, lying generally north and south, and at each end, swinging out in an embracing circle, there was a line of reef, tiny islands that were only white sand, naked to the gleaming moonlight It would be dark in the jungle, Doc hoped. —  157 - Terror And The Lonely Widow
  • Their delay in reaching the atoll was caused not only by the navigational error, but also by a head wind which greatly reduced the planes' speed. —  The Divine Wind
  • If the example of the Bikini atoll is anything to go by: a thriving marine system. —  New Scientist - Online News
  • It is already happening to part of Maduvvaree island in the northern Raa atoll, and the fear and disbelief are written on the face of the 45-year-old fisherman Abdullah Kamal. —  Climate Ark Climate Change & Global Warming RSS Newsfeed
  • Staged on a small island in the northwest corner of the atoll, the blast was expected to be about 3 megatons, however, U.S. military officials grossly underestimated its power. —  Web Edition | Bulletin of the Atomic Scientists
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Maldivean atolu; probably akin to Sinhalese ätul, interior (from the interior lagoon), probably from Sanskrit *antala-, interior, variant of antara-; see en in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. Formerly atollon; the name of such islands in the Maldive group; prob. from Malayalam adal, closing, uniting (Yule).
 

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/æˈtɑl/
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