Reef definition of Reef in the Free Online Encyclopedia.

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.

Reef

a sharp underwater or above-water elevation in the sea floor in shallow water that hampers navigation. Reefs are formed either by the erosion of the bottom and coasts of the sea or by colonies of coral.

Reef

a device for reducing sail area during a strong wind. The reef is usually a series of bands threaded through the sail, by means of which the sail is folded up when the boom or yard is taken up—that is, the sail is reefed, or taken in. Sails may have from one to four reefs.

Mentioned in	?		References in classic literature	?		Encyclopedia browser	?		Full browser	?
No references found	Sometimes, indeed, none too soon; for one reef was so close on the brig's weather board that when a sea burst upon it the lighter sprays fell upon her deck and wetted us like rain. Kidnapped by Stevenson, Robert Louis View in context It was on a reef of rocks, a few leagues from Porto de la Plata. Grandfather's Chair by Hawthorne, Nathaniel View in context The monster became a small island, a rock, a reef, but a reef of indefinite and shifting proportions. 20,000 Leagues Under The Sea by Verne, Jules View in context	reed relay reed switch Reed, David Aiken Reed, Ishmael Reed, James Alexander Reed, John Reed, John Shepard Reed, Joseph Reed, Luman Reed, Sir Carol Reed, Stanley Forman Reed, Thomas Reed, Thomas B Reed, Thomas Brackett Reed, Walter Reed, Willis Reed-Solomon code Reed-Sternberg cell Reedbuck reedfish reeding reedmergnerite Reeds Gap State Park Reeds, Plain Reedy Creek Park & Nature Preserve Reef reef breccia reef cap reef cluster reef complex reef conglomerate reef core reef debris reef detritus reef edge reef flank reef flat reef front reef knoll reef limestone reef milk reef patch reef pinnacle reef rock reef segment reef slope reef talus reef tufa reef wall reef-front terrace reefer	Reedsburg Cab Service reeducate reeducate reeducated reeducates reeducating reeducation reeducation Rééducation Posturale Globale Reedwork reedy Reedy Creek Emergency Services Reedy Creek Energy Services Reedy Creek Fire Department Reedy Creek Improvement District Reedy Creek Middle School Reedy Creek Park & Nature Preserve Reedy Lagoon Corporation, Ltd REEE REEEA REEEC REEEI REEEP REEES Reef Reef (knot) Reef (knot) Reef (sail) Reef (sail) reef a sail in Reef Aquarium Society of Charlotte Reef Ball Development Group Reef ball foundation Reef band reef breccia Reef builder reef cap Reef Check Reef Check California reef cluster reef complex reef conglomerate Reef Coral Fluorescent Protein reef core reef debris reef detritus reef edge Reef Education Network Reef Environmental Education Foundation Reef Fish Advisory Panel Reef Fish Restoration Association

Mentioned in

References in classic literature

Encyclopedia browser

Full browser

No references found

Sometimes, indeed, none too soon; for one reef was so close on the brig's weather board that when a sea burst upon it the lighter sprays fell upon her deck and wetted us like rain.

Kidnapped by Stevenson, Robert Louis View in context

It was on a reef of rocks, a few leagues from Porto de la Plata.

Grandfather's Chair by Hawthorne, Nathaniel View in context

The monster became a small island, a rock, a reef, but a reef of indefinite and shifting proportions.

20,000 Leagues Under The Sea by Verne, Jules View in context

Reef playV2('en/US/dd/ddshdsdydoht');playV2('en/UK/dd/ddshdsdydoht')

Reef