An erosion-resistant marine ridge or mound consisting chiefly of compacted coral together with algal material and biochemically deposited magnesium and calcium carbonates.

• 珊瑚礁一种耐侵蚀的海中山岭或高地,主要由珊瑚、海藻物质以及经过生化反应而沉积下来的镁和碳酸钙结合在一起而形成。