atoll

• POS: Noun
• HYPHEN: at=oll

CIDE DICTIONARY

atoll, n. [The native name in the Indian Ocean.].

 A coral island or islands, consisting of a belt of coral reef, partly submerged, surrounding a central lagoon or depression; a lagoon island.  [1913 Webster]

OXFORD DICTIONARY

atoll, n. a ring-shaped coral reef enclosing a lagoon.

Etymology

Maldive atolu

THESAURUS

atoll

ait, archipelago, bar, cay, continental island, coral head, coral island, coral reef, holm, insularity, island, island group, islandology, isle, islet, key, oceanic island, reef, sandbank, sandbar

ROGET THESAURUS

atoll

Island

N island, isle, islet, eyot, ait, holf, reef, atoll, breaker, archipelago, islander, insular, seagirt, archipelagic, Fluids in Motion.