An atoll is a ring-shaped coral reef and features a lagoon. Some examples of atolls are the Bikini atoll, Tubbataha Reef and Lighthouse Reef.
bikini atoll
the oppsite of atoll is planet
A lagoon boundary is an atoll.
bikini atoll
Allot and atoll.
Atoll is a noun.
Let's not strand ourselves on this atoll.
Ailinglaplap Atoll's population is 1,959.
Aur Atoll's population is 438.
The population of Ujelang Atoll is 0.
The population of Rongelap Atoll is 19.
Midway Atoll was created in 1988.