a reef composed mainly of coral and other organic matter of which parts have solidified into limestone.
a marine ridge or reef consisting of coral and other organic material consolidated into limestone
A mound or ridge of living coral, coral skeletons, and calcium carbonate deposits from other organisms such as calcareous algae, mollusks, and protozoans. Most coral reefs form in warm, shallow sea waters and rise to or near the surface, generally in the form of a barrier reef, fringing reef, or atoll. Coral reefs grow upward from the sea floor as the polyps of new corals cement themselves to the skeletons of those below and in turn provide support for algae and other organisms whose secretions serve to bind the skeletons together. The resulting structure provides a critical habitat for a wide variety of fish and marine invertebrates. Coral reefs also protect shores against erosion by causing large waves to break and lose some of their force before reaching land. The Great Barrier Reef off the northeastern coast of Australia extends for some 2,000 km (1,240 mi), making it the world’s largest coral reef.
A formation, at or near the surface of tropical waters, formed by skeletal deposits of corals, a form of sea life.
Note: Coral reefs form a protective environment for a wide variety of marine animals.
Note: Atolls — ring-shaped islands that nearly or entirely enclose a lagoon — are coral reefs.
Note: The largest coral reef is the Great Barrier Reef of Australia.
Note: Coral reefs are very sensitive to chemical pollution and changes in temperature and are considered to be in danger from environmental stress.
[kawr-uh l-root, -roo t, kor-] /ˈkɔr əlˌrut, -ˌrʊt, ˈkɒr-/ noun 1. a saprophytic orchid of the genus Corallorhiza, of the Northern Hemisphere, having elongated clusters of small flowers on a leafless stem. /ˈkɒrəlˌruːt/ noun 1. any N temperate leafless orchid of the genus Corallorhiza, with small yellow-green or purple flowers and branched roots resembling coral
noun 1. a part of the S Pacific, bounded by NE Australia, New Guinea, the Solomon Islands, and the New Hebrides: U.S. naval victory over the Japanese, May 1942. noun 1. the SW arm of the Pacific, between Australia, New Guinea, and Vanuatu
noun 1. any of numerous venomous elapid snakes, found chiefly in the New World tropics, as Micrurus fulvius (eastern coral snake) of the southeastern U.S., often brilliantly marked with bands of red, yellow, and black. 2. any of several other snakes, as of the genus Calliophis, of Asia, having red markings. noun 1. any venomous […]
noun 1. a town in SE Florida.