(名詞/可數) 巨大的冰山 (an extremely large iceberg)。
引句：
Scientists have been keeping a close eye on the "megaberg" designated as A68a since it split off from Antarctica back in July 2017 – and new research highlights just how much freshwater it's released into the ocean during its late melting process.
[sciencealert.com, 22 January 2022]
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