
1) Aquatic barrier 2) Aquatic habitat 3) Atoll barrier 4) Atoll component 5) Atoll formation 6) Atoll protector 7) Atoll, essentially 8) Backdrop for some schools 9) Bikini feature 10) Biodiverse habitat 11) Boat bottom basher 12) Boat bottom bumper 13) Boat-bottom bumper 14) Boating hazard 15) Break free at sea
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https://www.crosswordclues.com/clue/reef

1) Atoll 2) Bar 3) Island 4) Witwatersrand
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https://www.crosswordclues.com/clue/reef

(1) An underwater obstruction of rock or coral which can tear the bottom out of a ship. (2) To reef sails is to shorten them, tying them partially up, either to slow the ship or to keep a strong wind from putting too much strain on the masts.
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http://sj.sjgames.com/PirateTalk.html

• (n.) A large vein of auriferous quartz; -- so called in Australia. Hence, any body of rock yielding valuable ore. • (n.) A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral. • (v. t.) That part of a sail which is taken in or let out by means of the reef points, in order to adapt the siz...
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http://thinkexist.com/dictionary/meaning/reef/

Reducing the sail area by partially lower a sail. Also rocks which are close to the surface of the water.
Found on
http://www.diy-wood-boat.com/Boating-terms.html

Reduce the area of a sail.
Found on
http://www.encyclo.co.uk/local/20645

Race Employment and Education Forum.
Found on
http://www.encyclo.co.uk/local/20791

1. A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral. ... 2. <chemical> A large vein of auriferous quartz; so called in Australia. Hence, any body of rock yielding valuable ore. ... <zoology> Reef builder, any heron of the genus Demigretta; as, the blue reef heron (D.jugularis) of Australi...
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http://www.encyclo.co.uk/local/20973

(rēf) an infolding or tuck of tissue, as a tuck made in plication.
Found on
http://www.encyclo.co.uk/local/21001
Reef noun [ Akin to Dutch
rif , German
riff , Icelandic
rif , Danish
rev ; confer Icelandic
rifa rift, rent, fissure,
rifa to rive, bear. Confer
Rift ,
Rive .]
1. A chain or range of rocks lying at or near the surface of the water. See...
Found on
http://www.encyclo.co.uk/webster/R/33
Reef transitive verb [
imperfect & past participle Reefed (rēft);
present participle & verbal noun Reefing .]
(Nautical) To reduce the extent of (as a sail) by roiling or folding a certain portion of it and making it fast to ...
Found on
http://www.encyclo.co.uk/webster/R/33

A solid structure built of shells and other secretions of marine organisms, particularly coral.
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http://www.evcforum.net/WebPages/Glossary_Geology.html

An underwater structure; something that extends up from the seafloor but does not rise above the surface of the water like an island. Coral reefs are formed from the hard skeletons of coral. There are also rocky reefs, which are piles of rock under water.
Found on
http://www.pbs.org/emptyoceans/glossary.html

A ridge of rocks found in the tidal zone along a coastline. One common type of reef is the coral reef.
Found on
http://www.physicalgeography.net/physgeoglos/r.html

Reef is criminal slang for picking a pocket; steal; obtain dishonestly.
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http://www.probertencyclopaedia.com/browse/ZR.HTM

A submerged line of rocks (or coral).
Found on
http://www.quick-facts.co.uk/earth/glossary.html

A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals, red algae, and bivalves. Barrier reef
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http://www.scientificpsychic.com/etc/geology-glossary.html

A ridge of rock or other material lying just below the surface of the sea.
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http://www.stripers247.com/Fishing-Glossary.php

n. A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals, red algae, and bivalves; barrier reef- n. A reef growing offshore from a land mass and separated by a lagoon or estuary, e.g, the Great Barrier Reef of Australia; patch reef- n. A discontinuous reef growing in small areas, separated...
Found on
http://www.ucmp.berkeley.edu/glossary/gloss2geol.html

n. A large ridge or mound-like structure within a body of water that is built by calcareous organisms such as corals, red algae, and bivalves; barrier reef- n. A reef growing offshore from a land mass and separated by a lagoon or estuary, e.g, the Great Barrier Reef of Australia; patch reef- n. A discontinuous reef growing in small areas, separated...
Found on
http://www.ucmp.berkeley.edu/glossary/glossary_2.html

A ridge of rock or other material lying just below the surface of the sea.
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https://www.encyclo.co.uk/local/20127
noun a submerged ridge of rock or coral near the surface of the water
Found on
https://www.encyclo.co.uk/local/20974

An underwater obstruction of rock or coral which can tear the bottom out of a ship.
Found on
https://www.encyclo.co.uk/local/23412

rocky mound or bank, close to sea surface. Many reefs are built up by living organisms such as corals and sponges.
Found on
https://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3451.h

Reef is a name for boys and girls. The name Reef is most commonly given to English and Welsh boys. (2 times more often than to American boys.) Although in most countries Reef is a name given to boys. In the United States, 1 out of 48 Reef`s are girls.
Found on
https://www.pregnology.com/names/mixed/Reef
No exact match found.