coral reefs definition

  • noun:
    • Plural type of coral reef.
    • reefs, usually of great degree, comprised mainly of fragments of corals, red coral sands, plus the solid limestone caused by their particular combination. They're classified as fringing reefs, if they border the land; buffer reefs, when divided from the shore by a broad gear of liquid; atolls, when they constitute separate islands, often inclosing a lagoon. See Atoll.

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