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atoll |
Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson | 0.03 sec. |
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atoll: see coral reefs coral reefs, limestone formations produced by living organisms, found in shallow, tropical marine waters. In most reefs, the predominant organisms are stony corals, colonial cnidarians that secrete an exoskeleton of calcium carbonate (limestone).
..... Click the link for more information. . atollCoral reef enclosing a lagoon. Atolls consist of ribbons of reef that may not be circular but that are closed shapes, sometimes miles across, around a lagoon that may be 160 ft (50 m) deep or more. Most of the reef itself is usually below the water surface; around the rim along the top are usually low, flat islands or more continuous strips of low, flat land. atoll a circular coral reef or string of coral islands surrounding a lagoon atoll [′a‚tȯl] (geography) A ring-shaped coral reef that surrounds a lagoon without projecting land area and that is surrounded by open sea.
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No references found | The atoll of Hikueru lay low on the water, a circle of pounded coral sand a hundred yards wide, twenty miles in circumference, and from three to five feet above high-water mark. Didn't he fetch the atoll after eighteen days in the longboat? I live on an atoll, a low island, it is a strip of land surrounding a lagoon, and its beauty is the beauty of the sea and sky and the varied colour of the lagoon and the grace of the cocoa-nut trees; but the place where Strickland lived had the beauty of the Garden of Eden. |
atoll |
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