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reef |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson | 0.06 sec. |
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reef: see coral reef 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. . reef1 1. a ridge of rock, sand, coral, etc., the top of which lies close to the surface of the sea 2. a ridge- or mound-like structure built by sedentary calcareous organisms (esp corals) and consisting mainly of their remains reef2 Nautical the part gathered in when sail area is reduced, as in a high wind reef [rēf] (geology) A ridge- or moundlike layered sedimentary rock structure built almost exclusively by organisms. An offshore chain or range of rock or sand at or near the surface of the water. (mining engineering) A major ore trend or ore body. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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