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ice·capor ice cap (īs′kăp′)
An extensive dome-shaped or platelike perennial cover of ice and snow that spreads out from a center and covers a large area, especially of land or a polar region.
(Physical Geography) a thick mass of glacial ice and snow that permanently covers an area of land, such as either of the polar regions or the peak of a mountain
a thick cover of ice over an area, sloping in all directions from the center.
1. A glacier spreading out from a center and covering a large area.
2. A polar cap.