atoll
US /ˈæt.ɑːl/
UK /ˈæt.ɑːl/
1.
Atoll
a ring-shaped coral reef or island or a string of coral islands enclosing a shallow lagoon
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The divers explored the vibrant marine life around the atoll.
Die Taucher erkundeten das lebendige Meeresleben rund um das Atoll.
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Many Pacific islands are formed by atolls.
Viele Pazifikinseln werden durch Atolle gebildet.