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- Dictionaryreef/riːf/
noun
- 1. each of the several strips across a sail which can be taken in or rolled up to reduce the area exposed to the wind.
verb
- 1. take in one or more reefs of (a sail): "reef the mainsail in strong winds"
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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. [1] Many reefs result from natural, abiotic (non-living) processes such as deposition of sand or wave erosion planing down rock outcrops. However, reefs such as the coral reefs of tropical waters are formed by ...
Oct 19, 2023 · A reef is a ridge of material at or near the surface of the ocean. Reefs can occur naturally. Natural reefs are made of rocks or the skeletons of small animals called corals. Reefs can also be artificial—created by human beings. Artificial Reefs People create reefs for three chief reasons.
REEF definition: 1. a line of rocks or sand just above or just below the surface of the sea, often dangerous to…. Learn more.
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.
1. : to reduce the area of (a sail) by rolling or folding a portion. 2. : to lower or bring inboard (a spar) wholly or partially. intransitive verb. : to reduce a sail by taking in a reef. reefable. ˈrē-fə-bəl. adjective. reef. 3 of 3. noun (2) 1. a.
Jul 18, 2024 · Reefs provide a large fraction of Earth’s biodiversity —they have been called “the rainforests of the seas.” Scientists estimate that 25 percent of all marine species live in and around coral reefs, making them one of the most diverse habitats in the world.
Define reef. reef synonyms, reef pronunciation, reef translation, English dictionary definition of reef. n. 1. A strip or ridge of rocks, sand, or coral that rises to or near the surface of a body of water.
A reef is a long line of rocks or sand, the top of which is just above or just below the surface of the sea.
: a long line of rocks or coral or a high area of sand near the surface of the water in the ocean — see also barrier reef, coral reef
t. e. A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. [1] Most coral reefs are built from stony corals, whose polyps cluster in groups.
