Definition of Reefs. Meaning of Reefs. Synonyms of Reefs

Here you will find one or more explanations in English for the word Reefs. Also in the bottom left of the page several parts of wikipedia pages related to the word Reefs and, of course, Reefs synonyms and on the right images related to the word Reefs.

Definition of Reefs

Reef
Reef Reef (r?f), n. [Akin to D. rif, G. riff, Icel. rif, Dan. rev; cf. Icel. rifa rift, rent, fissure, rifa to rive, bear. Cf. Rift, Rive.] 1. A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral. 2. (Mining.) A large vein of auriferous quartz; -- so called in Australia. Hence, any body of rock yielding valuable ore. Reef builder (Zo["o]l.), any stony coral which contributes material to the formation of coral reefs. Reef heron (Zo["o]l.), any heron of the genus Demigretta; as, the blue reef heron (D. jugularis) of Australia.
Reef
Reef Reef, n. [Akin to D. reef, G. reff, Sw. ref; cf. Icel. rif reef, rifa to basten together. Cf. Reeve, v. t., River.] (Naut.) That part of a sail which is taken in or let out by means of the reef points, in order to adapt the size of the sail to the force of the wind. Note: From the head to the first reef-band, in square sails, is termed the first reef; from this to the next is the second reef; and so on. In fore-and-aft sails, which reef on the foot, the first reef is the lowest part. --Totten. Close reef, the last reef that can be put in. Reef band. See Reef-band in the Vocabulary. Reef knot, the knot which is used in tying reef pointss. See Illust. under Knot. Reef line, a small rope formerly used to reef the courses by being passed spirally round the yard and through the holes of the reef. --Totten. Reef points, pieces of small rope passing through the eyelet holes of a reef-band, and used reefing the sail. Reef tackle, a tackle by which the reef cringles, or rings, of a sail are hauled up to the yard for reefing. --Totten. To take a reef in, to reduce the size of (a sail) by folding or rolling up a reef, and lashing it to the spar.
Reef
Reef Reef, v. t. [imp. & p. p. Reefed (r[=e]ft); p. pr. & vb. n. Reefing.] (Naut.) To reduce the extent of (as a sail) by roiling or folding a certain portion of it and making it fast to the yard or spar. --Totten. To reef the paddles, to move the floats of a paddle wheel toward its center so that they will not dip so deeply.

Meaning of Reefs from wikipedia

- reefs such as the coral reefs of tropical waters are formed by biotic (living) processes, dominated by corals and coralline algae. Artificial reefs,...
- 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...
- greenhouse gas emissions. In some cases, artificial reefs have been developed as artworks. Artificial reefs generally provide hard surfaces where algae and...
- describe them as "annular reefs enclosing a lagoon in which there are no promontories other than reefs and islets composed of reef detritus" or "in an exclusively...
- The Great Barrier Reef is the world's largest coral reef system, composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres...
- Wreck Reefs: atoll 25 by 5 km, area 75 km2, open on the North. Islets found on the reefs include Bird Islet, West Islet and Porpoise Cay. Cato Reef: Cato...
- IUCN Red List, the reef triggerfish is listed as least concern. Although because the reef triggerfish is found to live in coral reefs there are still many...
- notable reefs. Fringing reef Recreational dive sites Recreational diving Southeast Asian coral reefs The Structure and Distribution of Coral Reefs Vidal...
- Sponge reefs are reefs produced by sea sponges. All modern sponge reefs are formed by hexactinellid sponges, which have an endoskeleton made of silica...
- reefs, pollutants, and algal blooms represent some of the factors exerting influence on coral reefs. Importantly, the jeopardy faced by coral reefs extends...