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- DictionaryReef/rēf/
noun
- 1. a ridge of jagged rock, coral, or sand just above or below the surface of the sea.
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A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic (non-living) processes such as deposition of sand or wave erosion planing down rock outcrops.
Oct 19, 2023 · A reef is a ridge of material at or near the surface of the ocean. Learn about natural and artificial reefs, their types, functions, and examples.
noun. a ridge of rock, sand, coral, etc, the top of which lies close to the surface of the sea. a ridge- or mound-like structure built by sedentary calcareous organisms (esp corals) and consisting mainly of their remains. a vein of ore, esp one of gold-bearing quartz. reef.
Learn the different meanings and uses of the word reef, from a part of a sail to a chain of rocks or coral. See examples, synonyms, etymology, and related phrases of reef.
A reef is a line of rocks or sand under the sea, often dangerous to ships. Learn more about different types of reefs, such as coral reefs, and see examples of reef in sentences.
May 11, 2024 · A coral reef is a complex of features formed by algae and calcareous skeletons of coral polyps and other organisms in shallow ocean areas. Learn about the types, structure, geochemistry, origins, and threats of coral reefs from Britannica.
Oct 19, 2023 · Learn what coral reefs are, why they are important, and how they are threatened by climate change. Find out how corals live with algae, what coral bleaching and ocean acidification mean, and what you can do to help preserve these habitats.
