Atoll

A horseshoe or circular array of islands, capping a coral reef system perched around an oceanic volcanic seamount
Found on http://life.bio.sunysb.edu/marinebio/glossary.a.html

atoll

[n] - an island consisting of a circular coral reef surrounding a lagoon
Found on http://www.webdictionary.co.uk/definition.php?query=atoll

Atoll

An irregular subcircular annular coral - algal reef surrounding a central lagoon in oceanic waters.
Found on https://www.encyclo.co.uk/local/20501

Atoll

NATO designation for Vympel K-13, R-3 air-to-air missile [SU;RU]
Found on http://www.jedsite.info/index.html

Atoll

A·toll' noun [ The native name in the Indian Ocean.] A coral island or islands, consisting of a belt of coral reef, partly submerged, surrounding a central lagoon or depression; a lagoon island.
Found on http://www.encyclo.co.uk/webster/A/140

atoll

noun an island consisting of a circular coral reef surrounding a lagoon
Found on https://www.encyclo.co.uk/local/20974

Atoll

• (n.) A coral island or islands, consisting of a belt of coral reef, partly submerged, surrounding a central lagoon or depression; a lagoon island.
Found on http://thinkexist.com/dictionary/meaning/atoll/

atoll

coral reef enclosing a lagoon. Atolls consist of ribbons of reef that may not always be circular but whose broad configuration is a closed shape up ... [4 related articles]
Found on http://www.britannica.com/eb/a-z/a/120

Atoll

A ring shaped reef composed largely of coral. These features are quite common in the tropical waters of the Pacific Ocean.
Found on http://www.physicalgeography.net/physgeoglos/a.html

atoll

atoll: see coral reefs.
Found on http://www.infoplease.com/ce6/sci/A0910497.html

Atoll

An atoll is a circular, or horseshoe-shaped coral island surrounding a lagoon with one or more openings to the sea.
Found on http://www.probertencyclopaedia.com/browse/AA1.HTM

atoll

Continuous or broken circle of coral reef and low coral islands surrounding a lagoon
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0020445.html

Atoll

Rear hemisphere heat-seeking missile.
Found on http://www.f-16.net/glossary-A.html

atoll

an island formed from a coral reef, sometimes circular or horseshoe-shaped, with a lagoon in the center
Found on http://www.pbs.org/kqed/oceanadventures/glossary/

ATOLL

[programming language] Acceptance, Test Or Launch Language (ATOLL) was the programming language used for automating the checking and launch of Saturn rockets. ...
Found on http://en.wikipedia.org/wiki/ATOLL_(programming_language)

Atoll

An atoll (l or l), sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely. There may be coral islands/cays on the rim.{rp|page=60} The coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water. The ...
Found on http://en.wikipedia.org/wiki/Atoll

atoll

Island surrounded by a coral reef.
Found on http://www.quick-facts.co.uk/earth/glossary.html

atoll

A circular reef that encloses a relatively shallow lagoon and extends from a very great depth to the sea surface. An atoll forms when an oceanic island ringed by a barrier reef sinks below sea level.
Found on http://www.encyclo.co.uk/local/22291

atoll

A roughly circular reef with an occasional small, low, coral sand island surrounding a shallow lagoon.
Found on https://www.encyclo.co.uk/local/22327

atoll

A continuous or broken circle of coral reef and low coral islands surrounding a central lagoon.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

Atoll

A reef that formed around an island. The island sank, but the continued growth of the coral resulted in a rounded reef.
Found on http://www.bgs.ac.uk/discoveringGeology/glossary.html

Atoll

A ring of low coral islands surrounding a lagoon.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

Atoll

A ring-shaped group of coral islands that are surrounded by deep ocean water and that enclose a shal
Found on http://www.encyclo.co.uk/local/22392

Atoll

A horseshoe or circular array of islands, capping a coral reef system perched around an oceanic volc
Found on http://www.superglossary.com/Glossary/Science/Marine_Biology/
No exact match found