noun🔗Share환초A type of island consisting of a ribbon reef that nearly or entirely surrounds a lagoon and supports, in most cases, one to many islets on the reef platform. Atolls have a unique geology, so not all islands with a reef and a lagoon are atolls"The airplane flew over a beautiful atoll, a ring of small islands surrounding a calm, blue lagoon. "비행기는 잔잔하고 푸른 석호를 둘러싼 작은 섬들의 고리인 아름다운 환초 위를 날았습니다.geologygeographyenvironmentnatureoceanChat with AIVocabulary GamePractice Reading
