Meaning of “atoll” in the English Dictionary

british dictionary

"atoll" in British English

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atollnoun [ C ]

uk /ˈæt.ɒl/ us /ˈæt.ɑːl/

a ring-shaped island formed of coral (= rock-like natural substance) that surrounds a lagoon (= area of sea water):

the Bikini Atoll

(Definition of “atoll” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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