How to Use "atoll" with Example Sentences

1. This is the bikini atoll .
2. An atoll is a ring-shaped island that encloses a central lagoon .
3. But mr kayanne is also leading a japanese project to create a beach made out of home-grown star sand in tuvalu , a south pacific atoll perilously close to sea level .
4. The largest coral atoll in the tuamotu archipelago is rangiroa : 20 tiny islets surrounding a large lagoon .
5. At roughly 8km wide , atafu atoll is the smallest of three atolls comprising the tokelau islands in the southern pacific .