What are the large sheets of ice that cover the polar regions called?

The large sheets of ice that cover the polar regions are referred to as icecaps. Icecaps are vast areas of ice that cover extensive landmasses, primarily found in polar regions and at high altitudes. They are significant in the Earth's climate system, reflecting sunlight and influencing global temperatures. Icecaps can be contrasted with other forms of ice, such as glaciers, which are smaller, flowing bodies of ice that move under their own weight. Icebergs are large pieces of freshwater ice that have broken off from glaciers or ice shelves and float in open water. Snowfields, on the other hand, are areas covered by snow but do not have the thickness or permanence associated with icecaps. The term "icecap" specifically captures the vast, thick ice formations characteristic of regions like Antarctica and Greenland.