coral reef

Definitions of coral reef
1

n a reef consisting of coral consolidated into limestone

Examples:
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Great Barrier Reef
the largest coral reef in the world; in the Coral Sea off the northeastern coast of Australia
Bikini
an atoll in the Marshall Islands; formerly used by the United States as a site for testing nuclear weapons
Eniwetok
an atoll in the Marshall Islands; site of an amphibious assault in World War II; later used temporarily by the United States to test atomic bombs
Kwajalein
an atoll in the western Marshall Islands that was used as a Japanese air and naval base during World War II
Midway Islands
an atoll in the Hawaiian Islands some 1300 miles to the northwest of Honolulu; site of an important United States naval base
Types:
atoll
an island consisting of a circular coral reef surrounding a lagoon
barrier reef
a long coral reef near and parallel to the shore
Florida key, cay, key
a coral reef off the southern coast of Florida
Type of:
reef
a submerged ridge of rock or coral near the surface of the water

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