ice cap
From Longman Dictionary of Contemporary EnglishRelated topics: Nature, Geography, Oceanographyice capˈice cap noun [countable] DNSGan area of thick ice that permanently covers the North and South PolesExamples from the Corpusice cap• He may have seen the continental ice cap, raised by mirage.• Adult males are nomadic, wandering all round the polar ice cap and living mainly off seals.• Coastal geographic states, such as Florida, would be particularly vulnerable to ice cap melting associated with such an increase.