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Noun atoll has 1 sense | ||||
Definitions from the WebAtollsDescription:An atoll is a ring-shaped coral reef or a series of reef formations enclosing a shallow lagoon in the center. They are typically formed from the remnants of extinct volcanoes that subsided below the water level. Atolls are usually found in tropical and subtropical regions of the world's oceans and seas. Sample Sentences:
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