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Atoll

Babylon English English dictionary

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atoll
n. coral reef surrounding a lagoon

Wikipedia English The Free Encyclopedia

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Atoll
An atoll (, , , , or ), sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely. There may be coral islands/cays on the rim. The coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water. The lagoon forms over the volcanic crater or caldera while the higher rim remains above water or at shallow depths that permit the coral to grow and form the reefs. For the atoll to persist, continued erosion or subsidence must be at a rate slow enough to permit reef growth upwards and outwards to replace the lost height.

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Atoll (disambiguation)
An atoll is a type of island.

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WordNet 2.0 Dictionary

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atoll

Noun
1. an island consisting of a circular coral reef surrounding a lagoon
(hypernym) coral reef
(hyponym) Kwajalein


Babylon German English dictionary

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Atoll (das)
n. atoll, coral reef surrounding a lagoon

Babylon French English dictionary

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atoll
nm. atoll, coral reef surrounding a lagoon


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