American Dictionary

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Definition atoll in American English

atoll noun

[countable] noun
/ˈæˌtɔl/
1

an island in the form of a ring, made of coral (=the pink or white outer structure of very small sea animals)

Synonyms and related words
1.1

used in the names of places

Example

Bikini Atoll

Synonyms and related words
Definition atoll in American English